Holley LS Hi-Ram EFI Manifold - 300-123 exhaust-cutouts The acceptable measurement range is

The acceptable measurement range is known as a tolerance

6L V8 1967 - 1975 Pontiac Firebird 400/6

Brand Holley Emission Code 5 Kit Type Renew Kit Model 4160 Product Type Rebuild Kit Warning California Proposition 65 Warranty Limited 90 Day

This upgrade is customers who have purchased this system and would like to replace the center muffler with our straight pipe assembly

Holley LS Hi-Ram EFI Manifold - 300-123 exhaust-cutouts The acceptable measurement range isOverview: The Holley GM LS1 LS2 LS6 Modular Hi Ram Intake Manifold is introduced as a cost effective alternative to fabricated sheet metal for high performance applications where induction system height is not limited. Coupling this Hi Ram intake with the high flowing LS1 LS2 LS6 style cylinder heads has outstanding potential for N A and forced induction applications at a budget minded cost. Aggressive, bold, race bred styling will make bad intentions