[70cst]

Originally Posted by piecesparts

Just a small $.02 worth. Unless you have a big block engine and you are driving it hard, that 3" exhaust maybe costing you some gas mileage and performance. Is the exhaust a single pipe or duals? If it is duals, then exhaust companys will tell you that the exhaust flow may be to slow or "Lazy" and is causing you some reversionary losses in your system.

The idea is for the exhaust to move along "Cooling" as it exits from the engine. That cooling effect is causing a slight vacuum effect pulling the gasses away from the headers and making the exhaust scavenge the fumes from the cylinders. Flowmaster will tell you that for a modified 350 to 383 cubic inch engine a dual 2 1/2" exhaust is the borderline for the amount of gases you will create, from that point on you are walking in an area of losses being more than gains. If it is a single exhaust system, then the 3" tubing is well worht the effort.

I prefer the Flowmaster sound to the Magnaflow sound, myself.

Very good point piecesparts... I will have Spin Tech's with factory manifolds connected to 2 1.2" pipes once my project is out the door. Flowmasters will be lower cost than Spin Techs ...but I just liked the sound of Spin Techs better but flowmasters will do you just fine.