I had a new exhaust system built for my 1991 V3500 Crew Cab. It was installed about 3-months ago at a local exhaust shop. Since my truck is lifted there was a problem with the cross-over pipe hitting the front drive shaft so I had them relocate the cross over pipe to clear the front drive shaft.
It is a single exhaust system with new exhaust manifolds, Flowmaster scavenger y-pipe, high flow pre-OBD II/CAT, and a cheap Jegs in-house turbo muffler. I had them make the tail pipe just a turn down past the 14-bolt diff. The exhaust shop located the O2 sensor bung in the Flowmaster y-pipe, and is a Delphi 4-wire O2 sensor.
It is a single exhaust system with new exhaust manifolds, Flowmaster scavenger y-pipe, high flow pre-OBD II/CAT, and a cheap Jegs in-house turbo muffler. I had them make the tail pipe just a turn down past the 14-bolt diff. The exhaust shop located the O2 sensor bung in the Flowmaster y-pipe, and is a Delphi 4-wire O2 sensor.
Last edited: