as far as I know you don't need cooler exaust temperature's for any engine.its cooler intake temperature if anything.cooler exhaust temp won't do shit for you and is unhelpfull.the exhaust temp is hot for a reason and that's an after effect of combustion.all a ceramic coated header does is it doesn't conduct heat as fast so it keeps the underhood temp down.

spoon and mugen are very very expensive brands and I haven't seen any significant gains using either products on my cars or my friends cars.I had a mugen power header on my gsr and it barely felt any different if any.

I'm not sure what header will fit but I assume a 4-2-1 header will fit better because the pipes don't stick out so far when they merge like a 4-1 header does.also if you car is dropped a 4-1 header will most likely scrape on everything.

 

hotter tems under hood will rob hp...especially if the car is boosted (since they tend to have hotter underhood temps due to the turbo). thats the point i was tryin to make. only way to really tell if the header makes a big difference is with a dyno. sure u can try to tell from the seat of ur pants, but the most accurate way to tell is a dyno.

 

hotter exhaust is actually better. as far as under hood temps, there is not to going to be that much of a difference under the hood between the two, it's hot as shit under there regardless. I would think the best thing to do would be to heat wrap the intake.

 

intake mani would still heat up.....but ur a turbo guy...u have to kno just how hot that turbo gets when its been runnin. and yes hotter exhaust is better, but to a point. theres a limit to how hot things need to get, ex temp being one of them. i agree that its still hot as shit under the hood, but the more moving parts (aka turbo) the hotter shit gets. n no matter what, heat robs hp. no way around that.

 

I think the main thing is that the ceramic header uses a cheap metal, I would take the couple extra degrees under the hood and get a stainless, I wish I would have when I had my Honda.

 

agreed. id rather have hotter hood temps than an exhaust leak from shitty metal. w.e u do, invest in a good header so u dnt end up with more problems down the road. and dont go cuttin the frame so things fit. there are companys out there that make aftermarket crossmembers thatl clear the header and what not.

 

a big ol' shot of nawzzz will take care of that problem .

Oll sillyness aside the only way too really cool engine intake temp down is getting more air to pass around those parts and cool them down.Adding a cai only positions the filter farther away.Making it able to intake cooler air but that air still needs to pass through the hot part of the engine therefore heating it back up.

Don't even get me started on diesels.There is no such thing as cooler intake temps on a diesel engine.If you cool the intake down it does more bad than good.As you may or may not know diesels don't have spark plugs.The incoming air is heated so much that when the fuel and air mix it combusts creating the power stroke of the engines cycle.Cooler exhaust temps will help on boosted motors of any type by keeping the moving parts cooler and cooler working parts are more efficent and have a longer life and less chance of breaking.

back on topic.4-2-1 is the way to go.

 

I really would just stick with a 4-2-1 unless you REALLY want to have that small ( I mean small ) edge in the quarter mile.

 

AMEN to that! ^^^