Hey guys 1st of all i know this is a stupid question but i need to make sure...lol...im purchasing a greddy 4-2-1 header to replace my stock gsr header on my daily driver and in a few months i plan in matching it with the greddy evo2 exhaust...and i was jsut wondering is it a bad thing to have an aftermarket header on but stock exhuast? i know dumb question but thanks

 

Its not bad to run your car like that but would help if you did put on an exhaust. Would give your car better exhaust flow and give you more top end power.

 

bump...i know stupid question but i need to have some more peeps confirm it please

 

Depends on how you look at it. Dumb as in it wont do anything in terms of power or responsiveness, or dumb as in the possibility of something breaking or not working because of it? Nothing bad will happen from having an aftermarket header pipe on a stock exhaust, but it wont really be a gain either. You are safe.