73-87chevytrucks.com
73-87 Chevy _ GMC Trucks => Performance => Topic started by: 81Cheyenne on June 25, 2007, 12:40:54 pm
-
I recently bought a 81 Cheyenne W/305 4bbl. It has a fairly new dual exhaust with glass packs.
Would it be worth taking to the local muffler shop and having a cross over pipe added?
The cats have already been removed by the previous owner.
-
Are you talking about adding a H-pipe? What are your reasons for wanting to add it?
-
My understanding is that a crossover "H" pipe decreases back pressure by distributing the pulses through both sides and also decreases the "rapp and pop" sound. Is this correct?
-
It equalizes exhaust pressure and is an easy way to tune your exhaust. I doubt it will help with popping though...sounds like maybe a lean condition or timing problem there