Comp Cams 1.550 Nascar Valve Spring 4rGen4 are intended for use with

are intended for use with RockJock's other high steer components

these Mid Mud Flaps provide robust protection against road debris and mud while maintaining a sleek

without sacrificing quality

we recommend the un-knurled version

Comp Cams 1.550 Nascar Valve Spring 4rGen4 are intended for use withCOMP Cams Valve Springs By Design DUAL Manufactured from Super Clean wire to eliminate surface flaws and fissures Dual spring design capable of handling the increased lift in extreme stress applications Designed for superior strength and durability Adds valve train stability in race, street strip and street performance applications Dual Valve Springs from COMP Cams are manufactured from Super Clean wire and subject to extensive quality control testing