Discover the revolutionary line of high-performance exhaust systems and specialized motorsport parts from F4U at Weld Racing Parts. Each exhaust and component is meticulously designed to deliver unparalleled performance on the track. Join the automotive elite and maximize your vehicle's potential with the quality and precision of F4U.
Welcome to the Exciting World of F4U in Motorsport
Experience and Passion:
With over 25 years of experience, at F4U we have been passionately dedicated to the world of motorsport. Each day, our dedication and commitment drive us to reach new heights in manufacturing and developing competition parts across various categories.
Innovation and Constant Development:
At F4U, we firmly believe in innovation as the engine of progress. From conceptual design to final production, each part that leaves our facilities represents the culmination of years of research, development, and refinement.
Reliable Partner in Competition:
We are proud to be recognized as a reliable partner in motorsport competition. Currently, we have the honor of supplying parts for the prestigious FIA RX2e Championship in collaboration with QEV Technologies.
More Than a Brand, a Community:
At F4U, we are more than just a brand; we are a community of motorsport enthusiasts. Our shared passion for speed, the thrill of competition, and the constant desire for improvement unite us.
Join the Adventure with F4U:
We invite you to join us on this exciting journey in the world of motorsport. Whether you are looking for high-performance parts for your competition team or simply share our passion for speed, you are welcome to the F4U family.
Side exhaust for Renault 5 GT Turbo 60mm in 304L stainless steel with oval trumpet. Designed to maximize engine performance in vehicles with over 180 horsepower. Enhances gas flow, offering a sporty sound and an aggressive look. Made in Spain by F4U with European materials and TIG welding, perfect for competition and drivers seeking maximum performance.
Enhance your Renault 5 GT Turbo performance with this dual-pipe downpipe featuring a V-Band connection and welded thermal blanket. Manufactured by F4U in 304L stainless steel, it optimizes exhaust flow, increases engine power, and ensures fast and durable installation. Ideal for both racing and daily use, offering greater durability and thermal protection.
Opel Speedster 3" Compressor Downpipe made of stainless steel for high performance, compatible with Tullet for the Z22SE engine. TIG welded, this removable downpipe allows for easy fiber replacement. Tested in competition teams, it increases your engine's performance and optimizes gas flow, maximizing power and efficiency.
Side exit exhaust pack for Renault 5 GT Turbo 2.5 inch made from 304L stainless steel with oval outlet. Developed to maximize engine performance on vehicles producing over 180 hp. This complete system improves gas flow, delivering a sporty exhaust note and a strong racing appearance. Manufactured in Spain by F4U using European materials and TIG welding,...
Complete exhaust section for Renault 5 GT Turbo made of stainless steel 304L, with a trumpet finish and without a silencer of 50 mm, designed to maximize your vehicle's performance. This exhaust optimizes gas flow, improving performance and providing a sportier sound. Manufactured in Spain by F4U, with high-quality European materials, it ensures...
Complete exhaust system for Renault 5 GT Turbo made of 304L stainless steel, featuring a 60mm trumpet and no muffler. Designed to maximize your vehicle's performance, suitable for engines starting from 180 horsepower. Enhances exhaust gas flow, providing a sporty sound. Manufactured in Spain by F4U with high-quality European materials and TIG welds for...
Optimize the performance of your Renault 5 GT Turbo with this 63.5mm V-band exhaust line pack. Made of high-quality 304L stainless steel, it offers greater resistance in demanding moments and a unique sporty sound. Ideal for engines with 180 horsepower or more. Designed and TIG welded in Europe, ensuring exceptional durability and performance.
Upgrade your Renault 5 GT Turbo with this complete Ø2.5" exhaust line pack. Made from 304 stainless steel and TIG-welded in Europe, it ensures precision, durability, and a flawless finish. Retains the OEM flange and comes without a silencer for a direct, unrestricted flow. Designed for the most radical and purist enthusiasts who want to keep the original...
Side sill jack stands, handcrafted and individually made in Europe, TIG welded using high-grade ST52 steel. Epoxy coated to resist scratches and wear, with a removable stainless tray. Designed for fast service during rallies. Durable and practical, even under extreme conditions.
Optimize your Renault 5 GT Turbo with this complete 2,5" exhaust line pack. Manufactured from 304 stainless steel and welded with TIG in Europe, this system includes a flex pipe, silencer, and V-band connection. Designed for powerful engines, it enhances performance and offers a unique sporty sound. Ideal for taking your driving experience to the next level.
High-performance exhaust manifold for R5 GT Turbo. Manufactured in stainless steel and TIG welded, designed with oval openings like the stock cylinder head for optimal power delivery. This design eliminates the round holes that typically cause turbulence and performance loss. Tested on engine dyno, this manifold significantly enhances engine performance.
Complete 2-inch exhaust system for Renault 5 GT Turbo, made of 304L stainless steel with a trumpet finish, homologated for passing the technical inspection in Spain. Designed to maximize engine performance, it optimizes gas flow and offers a sporty sound. Made in Spain by F4U with high-quality European materials and TIG welds for durability and resistance.
