Read helpful technical articles about Bosch L-Jetronic and Motronic fuel injection. These articles cover fuel injection idle adjustment, diagnostic procedures, and tune up instructions. Our reinforced couplers, elbows, and large diameter straight pieces are the highest quality silicone products available.
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Replace your car's air hoses with silicone hoses and eliminate power robbing vacuum leaks! HPSI hose kits use our finest, 100% silicone hose available and will last the life of your car. Our kits range from continuous length hose kits to pre-cut kits. Every single kit has been designed and made on the actual vehicle, no guesswork or universal fitments.
HPSI silicone radiator hoses are custom molded with multiple layers of high grade silicone and rip stop stitching reinforcement to provide efficient heat resistance and reduction, along with unmatched pressure tolerances. All of our radiator hoses are molded for OEM fitment and add aesthetic style to your engine bay.
Our HPSI silicone couplers and plenum intake kits use ultra high grade silicone with reinforced protection to provide the ultimate barrier against high heat temperatures and scenarios. All of our coupler kits combine stainless steel clamps, aesthetically pleasing colors, and OEM style fitment resulting in unmatched quality or comparison.
HPSI manufactures a complete line of silicone couplers. These are ideal for turbocharged or supercharged vehicles requiring couplers that can handle high boost and high temperatures. Our reinforced couplers, elbows, and large diameter straight pieces are the highest quality silicone products available.
HPSI uses a wide range of clamps for all our reinforced silicone and fuel applications. This includes stainless steel T-BOLT clamps, zinc plated fuel line clamps, and stainless steel "PROTECTOR" (guarded) clamps. Our guarded clamps prevent damage to silicone couplers and hoses when tightened, unlike the conventional worm gear clamps.
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