LT1 LE1 Heads 360 – 400+ rwhp; LT1 LE2 Heads 370 – 410+ rwhp; LT1 LE3 Heads 380 – 420+ rwhp; More information on cams can be found here. LE Intake Portwork Fully porting your LT1/LT4 intake manifold includes opening up TB holes to 58 MM, removing obstructions from behind the TB opening and enlarge runners from plenum area to gasket area ... Engine Intake Manifold-LS Single Plane Mid-Rise Intake Upper Holley 300-131 (Fits: 2014 Chevrolet Camaro) 5 out of 5 stars 1 product rating 1 product ratings - Engine Intake Manifold-LS Single Plane Mid-Rise Intake Upper Holley 300-131

BB Spread Port Conversion Kits 555-632. Kit includes: Dart Big Chief or Pro-FIler Intake, Dart Big Chief 14° & 18°, Big Duke 18° or Pro Filer 12° Heads, Jessel Shaft Rockers, Aluminum Sheet Metal Valve Covers, Cyl Head Stud Set, Wiseco / JE Pistons, Speed Pro Rings, Clevite Bearings, Custom Ground Camshaft (4/7 swap), Comp Cams Lifter Set, .080 Chome Moly Pushrods, Complete Gasket Set ...