3sge header to 5sfe, how much of an improvement and will it bolt up? Options

[goferris]

hey all. i've been thinking about getting a header for my pretty much stock 5sfe and have seen the headers on ebay but realised that the 3sge came stock with what looks like a pretty decent header.

i was just wondering if it would better to get a stock 3sge header with the heat shield already attached vs buying a cheap header off ebay then wrapping it. would the performance boost (however little it may be) be about the same?

also i'm pretty sure it would bolt to the engine just fine but how about to the rest of my exhaust system and would it fit in the space there? i'm sure i would eventually just get a whole new exhaust system header back but in the meantime will this fit before hand?

another reason i ask is because i was chatting with lewfx the other day about getting a header and he said it really heat up the engine bay when he had one on his celi. since the 3sge header is a stock one with the heatshield i figured it would be a little bit cooler and a lot better quality than the ebay headers.
TIA



VS



This post has been edited by goferris: Jul 12, 2008 - 9:12 AM

[delusionz]

They just want our JDM goodies, Doubtful it will do much on it's own without our larger valves/cams & ACIS manifold etc, Prolly sound a bit better I guess, 4-2-1 is designed to line up exhaust pulses perfectly so that the vacuum of 1 hot gas shooting out the back pulls the following pulse straight out with it in a chain reaction (hence the name extractors) and generally the aftermarket designs have long header pipes which go down right below the engine before joining in with the main stream, this improves flow.

FE engines don't really need performance exhaust since they're designed to be economical, get you from A to B with efficient low-end torque and nothing to waste at the top, Basically they don't open up with huge intake valves and they don't burn gas at a rate of 7,000 RPMs (3500 x 2lt of exhaust per minute) hence they were fitted with smaller who gives a crap pipes.