Quote:
Originally Posted by faceglide
Some prefer to use their air intake tract as a heatsink for the engine bay  ! Non-conductive materials FTW! |
Unless it adds tons and tons of power you'll end up losing I bet if metal. Dyno uncorrected in the winter and summer and you'll see. I would show 10-30 hp difference. if your manifolds heat soaked in summer traffic and in the pits etc, you'll be way down on power. Gaining power for one pull on a corrected dyno means nothing if you can't achieve that power 24/7.