Chevrolet Performance Aluminum Cylinder Head - Assembled - 2.165 / 1.590 in Valves - 260 cc Intake - GM LS-Series 89504 Firebird's exhaust system to bolt

Firebird's exhaust system to bolt up

The rear eyelet is bare and requires factory bushings or optional UMI 2625 (poly) or 2626 (Delrin) bushing and shackle kit

6 mm Thick Wall

Use with stock trailing arms for race or street

Chevrolet Performance Aluminum Cylinder Head - Assembled - 2.165 / 1.590 in Valves - 260 cc Intake - GM LS-Series 89504 Firebird's exhaust system to boltProduct Description: Cylinder Head Assembled 2. 165 1. 590 in Valves 260 cc Intake 68. 4 cc Chamber 1. 290 in Springs GM LS Series Chevrolet Performance has a wide selection of performance upgrade parts specifically for GM vehicles, as well as crate engines, you can add proven performance to stock vehicles. Looking to personalize your vehicle? Chevrolet Performance is the place. Inside youll discover a complete portfolio of Chevrolet, Buick, GMC and