I have a stock 03 EM2 Civic EX with 1.7L Vtec(D17a2 MT) and was debating if i should replace the stock exhaust manifold i have on now with headers? the stock Vtec EM look like headers already, and I was just wondering if it would make a increased horsepower difference (how much of a difference?) if i change over to headers, or should I just stick with the setup i have now?
running an apexi n1 catback,and AEM CAI
running an apexi n1 catback,and AEM CAI
You will feel no power gain by replacing your existing manifold. It's totally cosmetic.
i had the same thought, but wasnt completely sure,Thanks!
No problem 
I would stick with OEM unless you just want to make the engine bay look better. Depends on how much money you have to throw around.
I would stick with OEM unless you just want to make the engine bay look better. Depends on how much money you have to throw around.
