ISR Performance Silicone Coupler - 2.50 - 3.00" 45 Degree - Black Vehicle Model_Focus RS Supertech Valve Guides are stronger

Supertech Valve Guides are stronger than stock and help pull heat off of the valve

where organic street discs are correctly measured by fully compressing the engagement cushion (marcel) between the linings

positive shifts

It is a must for users who want highly accurate boost or fuel pressure readouts up to 15 PSI in their high performance supercharged or carbureted vehicle

ISR Performance Silicone Coupler - 2.50 - 3.00" 45 Degree - Black Vehicle Model_Focus RS Supertech Valve Guides are strongerPart #: IS 45250300 Silicone Coupler 2. 50 3. 00" 45 Degree Black ** All ISR Performance Products are Designed for Off Road Use Only ** Note: ISR orders might take a day of processing. If you need it sooner, contact us directly.