COMP Cams Valve Spring 1.550in Inter-Fit 955-12 OPT7 Lighting Inc Duration: 297 Intake / 299

Duration: 297 Intake / 299 Exhaust

Small Block 351 Windsor 351 c

Power gains of 10hp and 20tq to the wheels throughout the power curve is yet another reason you need to bolt on the Agency Power Race Tuned exhaust to your 2011 Mustang GT

High Sierra 1980 - 1982 GMC C1500 Sierra Grande

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COMP Cams Valve Spring 1.550in Inter-Fit 955-12 OPT7 Lighting Inc Duration: 297 Intake / 299COMP Cams Valve Springs, Retainers 955 12 Dual Valve Springs from COMP Cams are manufactured from Super Clean wire and subject to extensive quality control testing to deliver a valve spring assembly with superior strength, durability and valve train stability, no matter what the application. The dual spring design creates a stronger valve spring that can easily handle the increased lift found in extreme stress applications. COMP Cams Dual Valve