My 3sge manifold on my 5sfe, Just starting now Options

[Bigmeanbulldog55]

Well, if your check my profile you see that I was suposed to get the header put on today. Didn't happen. Since I just have the top, I've got make the rest and I ran into some problems today. No rods for my uncle's plasma cutter, and no saleen for my dad's tourch. Freakin sucked. I need to cut the flange out of the steel. I've got a question for the one's who know. I am putting this on with my stock sized exhaust, the 2 inch. I don't have a resinater, and I have a strate through muffler. I thought the size would help keep the noise and price of my exhaust down. My dad seems to think that it's a really bad idea to leave the 2 inch pipe there. Should I go ahead and up for the 2.5, or is it not worth the cost? I'm not sure how much it will cost, but I might go ahead and make it while I'm getting the pipes bent Thursday for the collector. I'll post pics when I'm done.

[Galcobar]

2.5 is excessively large for a 2.2L naturally aspirated engine -- you simply don't produce enough exhaust gas to use that much pipe efficiently.

2.25" is considered about as large as you want to go, and that's if you keep the RPMs up.

Now, if you're replacing your exhaust, 2.25" isn't that much more. However, a good resonator (an actual one, not the mid-muffler or glasspack design most people mistakenly call a resonator) will not impede flow but will smooth the tone considerably.