Quote:
Originally Posted by DansGen1Alero
It has been done before, the original aftermath (Robbie) I believe had true duals
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I never said it couldn't be done. I've seen the pics. I was just saying no one knows if a true dual system on an Alero is significantly better than a single for the extra effort spent on it.
Quote:
Originally Posted by darksobsession
i have the 2.2 eco
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For a full exhaust, I'd go with a header, to a high flow cat, to a cat-back with a resonator and straight through muffler, using 2.5" piping for the entire exhaust. To start out, go with the 2.5" cat-back with a straight through muffler and you could always upgrade the rest in the future.
Quote:
Originally Posted by DansGen1Alero
well what I been telling you is for the 3400, unless you plan on getting a supercharger or turbo and some major modifications, the 2.5 in diameter will be way to much for you. Its actually too much for a stock 3400 but at the time i was planing on s/c it.
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2.5" piping is a good size for both the Eco and 2.4. It's small enough to retain low RPM exhaust velocity, yet large enough to allow for high RPM flow. The 3400, being a full 1000cc's and 2 cylinders larger than the 2.4 would actually benefit more from a 2.75" or larger exhaust for N/A. That's a lot of exhaust to flow through the same little 2" stock piping that the 4 cylinders get. A fully free flowing 2.5" exhaust could also be used since the V6 doesn't rev as high as the 4's.
Going turbo, at least 3" is best for all 3 engines.