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Installation is a simple one-hour bolt-on process using OEM hardware
Edelbrock #77670 is a bare head
Satisfies performance requirements of GM 1052358
The AVS2 Series Carburetor Calibration Kit #1940 is for tuners looking to custom-tune the performance of their #1901
Manley Pushrod, P/ROD-4130 3/8 8.200 1990-pontiac-firebird-esi3548487 Installation is a simple one-hourManley Performance Pushrods are engineered to deliver uncompromising strength, stiffness, and valvetrain stability in todays high performance engines. Manufactured from premium materials and precision heat treated for maximum durability, Manley pushrods are designed to resist deflection under high spring loads and extreme RPM conditions. Consistent wall thickness and exacting tolerances ensure reliable valve timing and long term performance in both
