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660" Dual Valve Spring Kit
heat-treated to produce a 100 percent martensite grain structure
LSX Performance Parts proudly supplies the entire VCM Performance camshaft range
The Callies brand is known worldwide as being one of the industry leaders in horsepower and reliability
- Extra-thick Siamese cylinder bores
Texas Speed Stroker | 247/253 @ 112 Camshaft Package Scat Pro Comp I-Beam Conrods 660" Dual Valve Spring KitTexas Speed Stroker 247 253 @ 112 . 615" . 615" Camshaft LSX Performance Parts proudly supplies the ultimate upgrade for your LS build The Texas Speed 247 253 Camshaft. Texas Speed & Performance was founded in 2003 from humble beginnings. Texas Speed & Performance has fast become one of America's largest performance manufacturer & retailer of high end LSX & LT1 packages. Trevor Doelling & Jason Magnum (Texas Speed & Performance Founders) have combined