"Beyond the Limit: Experience Ultimate Connection with HPI FIA-Certified Racing Harnesses" Once you have perfected your cooling system and mastered engine thermal management, the next step is preparing yourself to become truly connected to your machine. Whether you can push the accelerator with full confidence on the circuit depends entirely on how securely and stably you are seated. HPI’s racing harnesses and floor bars are designed to support your drive with reliable safety and the ultimate hold. 1. Reliability and Precision: FIA-Certified "Safety" and "Operability" Why do top drivers choose HPI? It is not just about holding power—it is about the flexibility required to react instantly under the extreme conditions of a circuit. World-Class Trust: FIA-certified models recognized in competitions both in Japan and overseas. Because these are pieces of equipment you trust your life with, we maintain uncompromising quality. Engineered for Performance: Designed to minimize body movement while allowing for quick, precise strap adjustments, ensuring drivers can focus entirely on their driving line. The Ace’s View: Uncompromising Trust Brought by FIA Certification "Many drivers think a harness just needs to hold them in place. But to shave down lap times in the extreme conditions of a circuit, you need 'flexibility' that doesn't hinder split-second decisions and operations. HPI's lineup includes FIA-certified models. Because this is equipment you entrust your life to, our development team maintains uncompromising quality." Gear up like a pro. ACE is locked in and ready for the track. 2. Seamless Installation Without Modifications — The Definitive Benefits of Floor Bars When installing a harness, many drivers worry about modifying the vehicle body. HPI eliminates that hurdle with original ideas. No Vehicle Modifications Required: This floor reinforcement bar allows you to attach seatbelts without modifying the vehicle body. Simultaneous Chassis Rigidity Enhancement: By running floor bars across the left and right sides of the driver and passenger seats, vehicle rigidity is increased. It not only securely anchors the seatbelts but also brings the secondary benefit of improving body rigidity. Smart Installation and Dedicated Design: For the shoulder belts, you can use the factory seatbelt mounting bolt holes of the rear seats. These are vehicle-specific masterpieces born from our deep familiarity with the floor layouts and body structures of iconic cars that HPI has worked with for years—such as the BNR32, S15, GR Yaris, and R35. Note for Competition Use: When competing, please use in accordance with various regulations. HPI Floor Bar: High-rigidity stainless steel construction designed for superior chassis reinforcement. Available for a wide range of vehicle models. 3. Three Choices to Match Your Driving Style ・4-Point Racing Harness: Balances street convenience with authentic circuit holding performance. An ideal model for those taking their first step into circuit debuts. https://www.hpijapan.com/product-page/4-point-racing-harness ・FHR-Compatible 6-Point Racing Harness: Fully compatible with FHR systems (such as HANS devices) and packed with functional details refined in real racing environments, such as integrated Velcro for securing drink tubes. https://www.hpijapan.com/product-page/6-point-racing-harness ・FHR-Compatible 6-Point Racing Harness (Advanced) [FIA Certified]: HPI's lightest FIA-certified 6-point harness model, engineered for ultimate weight reduction without compromising safety or strength. Designed to work seamlessly with FHR systems, it delivers maximum holding power and driver mobility under high-G conditions. Available in Red and Black. https://www.hpijapan.com/product-page/6-point-fhr-racing-harness-advanced Drivers' Impressions We received genuine impressions from users who enjoy HPI racing harnesses and floor bars, ranging from circuit runs to everyday driving. Thank you for your cooperation. 🚗Toyota 86 (ZN6) Owner: "During hard cornering on the circuit, my body is firmly fixed to the seat with zero play. Body movement caused by G-forces used to be a problem, so I am really impressed by this! Installation used existing bolt locations and the floor bar, so I didn't need to modify the vehicle side and managed to do it myself, which was a huge help. Thanks to the floor bar, there is a solid sense of security, and the belt itself has good thickness. The solid 'click' feeling when tightening is completely different from cheap products. Safety is a given, but operability and the solid feel of the body have improved so much that I'm really glad I made this choice." 🚗Nissan Silvia (S15) Owner: "The floor bar is truly a welcome feature because it allows the harness to be securely anchored without any body modification. Running the bars across the left and right increases the solidity of the chassis, so the sense of security during sports driving is totally different. Also, being able to release the buckle smoothly without it snagging is quietly the best part. Because you can choose colors, it's a plus that it's easy to match the interior atmosphere. The stitching is quite neat, and I've been using it pretty hard with zero sagging or fraying so far." 🚗Honda Civic (FK7) Owner: "It restrains the body securely, yet there is no strange sense of pressure while driving. It doesn't feel overly restrictive, and the body adapts naturally. The introduction of the floor bar was also a smart bolt-on installation, and not having to worry about modifications was great. The buckle can also be released intuitively with a click, so stopping by a convenience store isn't a hassle at all. Honestly, it's a product that thinks more about the user's side in actual practice than what's just written on the catalog specs!" The harness and floor bar are the final links connecting you and your machine. They are not just about holding your body in place—they enable accurate steering and pedal work, serving as your ultimate weapon to conquer the circuit faster and more safely. Protect your engine with cooling systems, and protect yourself and your machine with HPI harnesses & floor bars. Enjoy the "ultimate drive" to your heart's content with this foolproof setup. Complete color lineup for HPI Racing Harnesses. From classic solid colors to our exclusive 'Sumo' edition, available as a special order. Find the perfect match for your cockpit. ⚠️Color options differ between 4-point and 6-point models. For details, please contact us.

Time to Rethink Your Cooling System: The True Power of "EVOLVE" to Dominate Midsummer. Have you ever felt a cold sweat watching your water temperature gauge during a summer traffic jam or a track run? Turn the Intense Heat to Your Advantage: The "EVOLVE" Performance Radiator That Supports Your Summer Drives. With the peak of summer fast approaching, are you worried about your car’s water temperature gauge? Whether you’re pushing through continuous laps at the circuit or navigating stop-and-go traffic in the scorching heat, ensuring your engine performs at its best requires a solid cooling system. The "EVOLVE" series, which HPI continues to refine, is more than just an increase in capacity; it is a "crystallization of technology" designed to control coolant flow and push core performance to its absolute limits. 1. Beyond "Cool": The Overwhelming Heat Dissipation of Micro-Pitch Fins At the heart of every EVOLVE radiator lies our "Micro-Pitch Fin" technology. By precisely designing the fin shape and increasing the number of core tubes by approximately 20%, we have maximized the surface area for contact with airflow. This high-density design effectively captures every breeze to whisk away heat, enabling stable water temperature maintenance even in the most brutal conditions. 2. Uniform Flow Changes Performance: The "Control Plate" In vehicles with an upper-and-lower or side-hose layout, uneven coolant flow means you are only utilizing a fraction of your cooling capacity. HPI’s uniquely developed "Internal Control Plate" is a magical component that regulates flow within the upper tank, ensuring the coolant circulates evenly throughout the entire core. This eliminates "hot spots" where heat tends to accumulate, allowing you to utilize the entire surface area of the core without waste—a result of our relentless pursuit of efficiency. Visual proof of superior cooling: Thermographic analysis demonstrates how the HPI Control Plate ensures uniform coolant flow, eliminating temperature variations across the entire radiator core. 3. Three Options to Match Your Driving Style We offer three series tailored to your needs, from the circuit to the street: STD Series: Features a large-capacity core with overwhelming thermal capacity, handling long, hard drives with ease. LIGHT SH Series: An all-around model that achieves a high-level balance between street drivability and circuit cooling performance. MULTI FLOW Series: Our top-tier model that optimizes coolant circulation via a side-tank structure, managing residence time to achieve exceptionally stable water temperatures. 　　　　　　　　　　　　　　　　　　　　View Specs & Compatibility HPI EVOLVE Radiator Performance Data: A comparison of cooling efficiency between the EVOLVE STD, Light SH, and Multi Flow series under circuit driving conditions at Sodegaura Forest Raceway. Engineered for performance icons: The HPI EVOLVE radiator featuring Micro-Pitch Fin Tech and superior flow control. Engineering Insight: PROTO’s Perspective "For EVOLVE, the aspect we were most uncompromising about was the 'joint between the fins and the tubes.' Even the slightest misalignment can ruin the original heat dissipation performance of the Micro-Pitch Fins. That is exactly why we make zero compromises in our welding process. Honestly, there are moments when we struggle with the balance of production efficiency and cost. But we want the drivers who choose our Performance Radiator to enjoy full-throttle runs at the circuit without ever worrying about their water temperature. Delivering 'peace of mind' and the 'ultimate driving experience'—that is the pride of HPI.” HPI designs each radiator with an optimal configuration tailored to the specific thermal characteristics of every vehicle, ranging from legendary cars such as the AE86, JZX100, S15, and BNR32 to the latest models. Series Primary Applications Price (excl. tax) STD JZX100/110, S15, FD3S, etc. from 65,000 JPY SH AE86, BNR32, JZX100/110, etc. from 65,000 JPY MF JZX100, BNR32, ZN6, etc. from 90,000 JPY Note: Models compatible with water temperature sensor attachments are widely available. Voice of HPI Users We would like to thank our customers for sharing their experiences. JZX100 (Chaser) Owner: "I used to have to pause for cool-down laps constantly because my water temperature would spike when drifting in 1st and 2nd gear. Since switching to EVOLVE, the temperature rise is noticeably milder. I’m spending less time cooling down and more time actually driving. Plus, the finish on the tank is stunning—I love opening my hood now!" S15 (Silvia) Owner: "I used to back off the throttle the moment I saw the temperature needle climbing during circuit runs. But with my HPI radiator, the temperature stays rock-solid even when I’m pushing it hard. Those who drive aggressively will immediately notice the difference in peace of mind." AE86 (Trueno) Owner: "Driving a classic car in summer traffic used to make me nervous. I chose the LIGHT SH model because I heard it was lightweight, and it has genuinely made managing water temperatures so much easier. It was a direct fit for my sensors, saving me a lot of hassle, and now I can enjoy driving even in the heat of summer with total confidence." Closing Message Your cooling system is the final line of defense for your engine and the greatest weapon to support your performance. This summer, equip your car with the trust that comes with the name "EVOLVE." The full aluminum HPI EVOLVE radiator—precision-engineered for maximum thermal efficiency and engine reliability. Looking to further enhance your cooling efficiency? Check out our oil coolers as well! For inquiries or price quotes, please visit:

Today, June 24th, marks HPI’s anniversary. Since our founding in 1998, we have been running for 28 years. To celebrate this milestone, we are launching a special project🎂 ACE, HPI's passionate test pilot and mascot. Interviewer Introduction: ACE The hot-blooded test pilot and mood-maker of HPI! With his signature catchphrase, "With these parts, I can push it even harder!" ACE is a cool robot in red and black. A drift master who pilots an S15 Silvia, he loves racing and passionate driving above all else. At events, no one speaks about HPI’s "passion for driving" with more fervor than ACE— he truly is HPI's ace. Ryusaku Hitomi x ACE: A Special Talk ACE: Every day, I push machines to their limits on the test track, feeling in my very core how much a single part can change a car’s performance. That’s exactly why I wanted to touch the "root of the strictness" behind the President’s approach to craftsmanship. President Hitomi, could you spare a moment? I want to hear about your roots! Hitomi: That’s an interesting project. Sure, why not? My interest in "moving things" started when I was 10 or 11 years old. I was fascinated by the way a chain moved over a sprocket, and I wanted a bicycle so badly. Since my family were farmers, I helped out with the farm work to earn one. Then, I encountered another "moving thing"—a tractor. It was so mysterious. It obviously had an engine, but you couldn’t see it from the outside. So, even though I was just an elementary school kid, I climbed in and managed to drive it somehow. Eventually, I got that bicycle I wanted, but I immediately took it apart piece by piece. I just wanted to understand the mechanism as fast as possible. I never thought about how to put it back together, so I ended up with a pile of parts and no idea where they went. My parents were stunned. (Laughs) ACE: A tractor in elementary school! So that’s where the same obsession with machinery that we have today was ignited. That gives me chills! Hitomi: Exactly. When I was 11 or 12 years old, my older brother bought a motorcycle. Instead of asking for a ride, my first thought was, "I want to take that apart, too." Our farmhouse shed had all the tools needed for tractor maintenance, so I snuck in and dismantled his motorcycle behind his back. Again, I didn't think about reassembly, and it had far more parts than the bicycle. My brother was furious when he found out— I got the beating of a lifetime. (Laughs sheepishly) ACE: I see. For you, disassembling was a process of understanding. It’s the same way I read a machine’s behavior on the circuit. What was the first car you owned, President? Hitomi: I bought a used Kawasaki W1 back when it was at the absolute peak of its popularity. It was delivered on a Saturday, and I was planning to take it out for a real ride on Sunday. After a quick test ride around the neighborhood, I was washing it, feeling absolutely pumped. Then, a friend who loved bikes came over and asked, "Let me ride it." I hadn’t even really ridden it myself yet, but I let him take it, and I hopped on the back for a tandem ride. We ended up getting into an accident and totaled the bike. I didn't even have a chance to take it apart. I was unconscious for two days because of that crash, and I learned my lesson— I swore to myself right then that I was done with motorcycles. ACE: Oh my... totaled the day after delivery, and unconscious... It’s hard to imagine the President like that today. But perhaps the reason HPI products are so obsessed with "safety" and "reliability" is rooted in that very experience. After swearing off bikes, why did you choose to go back to "driving" and “manufacturing"? Hitomi: After I graduated from high school, I rented a room in Setagaya, Tokyo, and got a job at a Toyota dealership. Even though I was working for Toyota, my first real car was a Mazda Presto Rotary. I used it for commuting every day and went out driving every single night. Back then, "tuning" basically meant welding the differential, and since you couldn't just buy wide wheels, we’d modify steel rims— what we called "steelie wides.” (custom-widened steel rims) We just drove the streets with pure guts. I formed a team with a few guys, and we’d go touring together. I still vividly remember the "Aoyama Zero-Yon"(the local drag racing scene) meets back then—Mr. Amemiya (Representative of RE Amemiya) would be there too. Whenever the man they called the "God of Rotary" showed up, the whole atmosphere at the venue would explode with energy. He had that kind of overwhelming presence even back then. ACE: Starting from modifying steel wheels is truly the origin of ingenuity. Hearing about your encounter with Mr. Amemiya really captures the intensity of those days. I’ve heard that back then, people used to say, "Hitomi’s driving is on the edge." Hitomi: Yeah, I became famous on Route 246 for having "edgy driving." Back then, I was just obsessed with speed, but driving on public roads always carried danger. After witnessing two life-threatening accidents, I realized something profound: "True speed and technology can only be pursued in a protected environment." That’s when I decided to graduate from street racing and challenge myself in the world of formal racing. ACE: I see. You channeled your passion for speed into a path of safety and technological innovation. Knowing the weight of a human life is what created HPI’s current "commitment to performance." That’s such a deep story. Hitomi: First, I went to Fuji Speedway just to see what racing was like. I had no money, so at first, I watched from outside the guardrail. The first thing I saw was a 240Z (S30) tearing up the track. I was shocked. I later found out it was just a test run. Seeing that, I was so moved by how incredible racing cars were. I saved up money, finally got onto the circuit, and was blown away by the size of the main grandstand! The track was so wide, I thought, "Maybe I can do this too." That was the spark. ACE: From watching from behind the guardrail to standing on that very field— it’s amazing to think that HPI parts today were born from that "shock" you felt that day. It really makes my heart race. Hitomi: Anyway, I bought a KE10 Corolla to start racing. Four of us formed a privateer team and rented a garage near the circuit. We spent every weekend there for maintenance and practice. I entered the "Freshman" class, but I couldn't reach the top. Back then—and even now—well-funded teams are just strong. They have the leeway to blow an engine and still keep going. I realized, "I have to do this for real." I quit my job and started working part-time for a transport company. Why? Because I figured I could borrow a truck to transport the race car and save costs. I poured almost my entire salary into racing and gained experience as a driver. In the middle of all that, I had my race engine tuned by a place called Fukagawa Internal Combustion (Fukagawa Nainenki), and that’s where I had a fateful encounter that changed my life. Where it all began: President Hitomi’s first car, the Mazda Familia Presto Rotary. A dedicated mechanic fine-tuning an engine, capturing the detail and focus required for high-performance automotive maintenance. ACE: To beat the big-budget teams, you shaved away your own efforts, sharpened your wits, and through dialogues with professionals like Fukagawa Internal Combustion, pushed the machine’s potential to the absolute limit. President, thank you for sharing your incredibly passionate origins! ACE: Everyone, this is just the beginning of the President's roots! Next time, we’ll dive into the adventure called "Founding the Company," where the President's life takes a dramatic turn. Stay tuned for the next installment of this special talk between President Hitomi and me, ACE, where we touch the very core of "HPI’s roots." HPI will continue to accelerate our "passion for driving" with all of you! 🏎️🔥 (Note: The street driving mentioned in this article reflects the traffic environment and social context of that era. It should not be interpreted as acceptable under modern traffic laws or safety standards. HPI prioritizes strict adherence to traffic regulations and promotes only safe and legal motorsports activities.)