Flowmaster 50 Series Big Block Muffler - 2.75" Dual Inlet / 2.5" Dual Outlet H776C01L This 1" Phenolic adapter that

This 1" Phenolic adapter that allows the Holley #R4412 2BBL carb to be mounted on 4BBL manifolds that have the standard Holley bolt pattern

Replacement caliper bolts fit most GM calipers and allow for easy installation and removal

500 in Round Port

2 in Lap Belt

chromoly u-joints for improved header clearance

Flowmaster 50 Series Big Block Muffler - 2.75" Dual Inlet / 2.5" Dual Outlet H776C01L This 1" Phenolic adapter thatThe 50 Series Big Block muffler is made for more than just big cubic inch engine applications. Its large case size with internal tuning chamber provides mileage and power gains along with maximum sound control for a quiet interior tone, even under heavy loads. Well suited to heavy duty vehicles such as full size trucks, SUV's, RVs, and tow vehicles. Constructed of 16 gauge aluminized steel and fully MIG welded for maximum durability. Features: Durable