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

[Galcobar]

4-2-1 generally favours a broader range of RPMs at which it flows well, whereas 4-1 tends to be more specific.

Whether and how much each favours the lower, middle or upper RPM ranges depdends on runner lengths. That said, stock designs typically favour the lower end of the spectrum to improve drivability (read stop-and-go traffic), even on more performance-oriented G heads.