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LSX Performance Parts proudly supply the very best in performance valve springs for your build
The PAC 1207X features the latest technology in valve springs which ensures maximum spring life with its superior design & material integration
- Rod Material: Forged 4340 Steel
- Steel Retainers Set
Dart Pro 1 LS3 15 Degree 280cc Cylinder Heads | Assembled 871230 LSX Performance Parts proudly supplyDART Pro 1 LS3 15 Degree Cylinder Heads 280cc 68cc Chamber "With a stock valve in the head and no porting other than a bowl blend these flow just over 370 cfm on the intake side at . 800 inch lift, but it's the exhaust side that's the killer these castings have 252 cfm of exhaust flow at . 800 inch lift! Richard Maskin, Dart Machinery" Dart stand at the forefront of race winning achievements with their innovation & development of blocks, cranks & of
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