Looking for a significant power and torque increase for your classic A-body vehicle (1964-1967 Chevelle, GTO, Skylark or Cutlass) through the addition of a mandrel bent exhaust system? Flowmaster's latest Header-back system for early GM A-Body vehicles with V8 engines is a truedual design and not only increases power but delivers that great muscle car sound. This aggressive sounding American Thunder system is constructed from 409S stainless steel for maximum durability and is covered by Flowmaster's 10-year warranty. Kit #817412 runs from the transmission cross member, through a welded H-Pipe assembly, into 2.50" Super 40® mufflers - through tailpipes that dump down in the rear quarter panel behind the tire.
