Engine Blocks

Holley GM LS2/LS3/LS7/LSX Trussed Valley Cover - Natural Billet 241-263 Holley's new trussed LS valley covers are the latest addition to our expansive lineup of LS engine dress up products. Machined from billet aluminum and featuring a modern...

Holley GM LS1/LS6 Trussed Valley Cover - Black 241-262 Holley's new trussed LS valley covers are the latest addition to our expansive lineup of LS engine dress up products. Machined from billet aluminum and featuring a modern trussed design, these LS...

Holley GM LS2/LS3/LS7/LSX Trussed Valley Cover - Black 241-265   Holley's new trussed LS valley covers are the latest addition to our expansive lineup of LS engine dress up products. Machined from billet aluminum and featuring a modern trussed...

LSXceleration Gen IV Trussed Valley Cover - Polished 54-264 Trussed valley cover for Gen IV LS Engines. Must use DOD Oil Block Off Plugs # 54224-8 if deleting DOD/AFM. Features: NON AFM/DOD Valley Cover  Trussed Design Includes...

LSXceleration Gen III Trussed Valley Cover - Polished 54-261 Trussed valley cover for Gen 3 LS Engines.  Features: Does not have Knock sensor provisions  Trussed Design Includes Fasteners Does Not include gasket Polished Finish

LSXceleration LS2/LS3/LS7/LSX Finned Polished Valley Cover 54-267 Gen 4 Valley Cover without DOD/AFM provisions. This valley cover does not have o-rings to seal the DOD oil galleys like some of the OEM valley covers. You must use our DOD oil...

LSXceleration LS2/LS3/LS7/LSX Finned Black Valley Cover 54-268 Gen 4 Valley Cover without DOD/AFM provisions. This valley cover does not have o-rings to seal the DOD oil galleys like some of the OEM valley covers. You must use our DOD oil...

LSXceleration Gen III Trussed Valley Cover - Black 54-262 Trussed valley cover for Gen 3 LS Engines.  Features: Does not have Knock sensor provisions  Trussed Design Includes Fasteners Does Not include gasket Back Finish

LSXceleration Gen IV Trussed Valley Cover - Black 54-265 Trussed valley cover for Gen IV LS Engines. Must use DOD Oil Block Off Plugs # 54224-8 if deleting DOD/AFM. Features: NON AFM/DOD Valley Cover  Trussed Design Includes Fasteners Does Not...

LSXceleration LS1/LS6 Finned Black Valley Cover 54-258 Gen 3 Valley Cover without knock sensors.

LSXceleration LS1/LS6 Finned Polished Valley Cover 54-257 Gen 3 Valley Cover without knock sensors.      

Billet Main Caps for GM LSX, LS7 Blocks by Pro-Gram Engineering Requires line bore / hone for fitment, LS7/LSX also requires thrust to be finished on block. Made in USA! With the influx of lesser quality goods and materials to the US, Pro-Gram...