Headers 604 Crate Modified 1981-checker-marathon-esi6585058 Main Bearing - V-Series -

Main Bearing - V-Series - Standard - Extra Oil Clearance - Small Block Chevy - Kit

00-inch internals and a built-in resonator helping keep the interior sound down to a minimum

Manifold Pressure Relief - Square Bore - Hardware / Spacer / Springs Included - Gaskets Required - Aluminum - Black Anodized - Naturally Aspirated / Nitrous Manifolds - Each

Fitting - Adapter - Straight - 12 AN Female to 16 AN Male - Aluminum - Black Anodized - Each

25 Thread - Hex Head - Chromoly - Black Oxide - Nissan - Kit

Headers 604 Crate Modified 1981-checker-marathon-esi6585058 Main Bearing - V-Series -Headers IMCA UMP Modified 1. 625 to 1. 75 in Primary 3 in Collector Gaskets Hardware Included Steel Black Paint Small Block Chevy Pair