Join Date: Feb 2011
Location: Omaha, NE
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Let's assume the HP gains are after you get your custom tune. Here is what the HP gains might look like, per item:
ported throttle body (5-10hp)
catback exhaust (5-10hp)
long tube headers (15-25hp)
high flow cats or cat delete midpipes (15-20hp)
aftermarket camshaft (40hp)
higher flowing heads (35hp)
CAI (a good one like Legmaker or AFE) - (10-15hp)
Custom CMR tune (will need a Diablo Intune for this, in order to datalog and adjust a/f for mods)
TOTAL HP GAIN : 155 rwhp. (With this number I am going with the higher estimate values I posted). Now that, to me is a lot of power when fully completed. And, all naturale. No forced induction.
As far as where to start. Most folks open up the intake and exhaust with a good cold air intake, and catback system. You won't really see gains on the exhaust until you replace the stock headers with some long tubes. Catless may not be legal in your state, but they can yield the most HP gains. A ported throttle body will give you much better throttle response, and the larger opening will be important once you are pumping in more air into the motor. You may be able to go this far without a tune. Obviously adding the more aggressive camshaft and heads, you will need a custom tune. Exhaust will cost a lot, as will the installation and purchase of the heads and cam. Some of the other items aren't that bad. Mods work as one big PUNCH, it's not just one mod, but how they synergistically work together as a whole. The more mods, the more gains. If you want quick and easy power, you just can't beat a supercharger.
I am not an expert, but I've researched it a bunch and have a friend who has a '10 SRT which is pretty jacked up. He doesn't even have an aftermarket catback, but it still sounds mean with the cam and long tubes.
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2010 Challenger R/T Classic .... sold, but not forgotten.
new rig :
2015 Chevy Traverse LTZ, siren red tintcoat.
- Husky all weather floor mats
- Lund bug deflector
- 20% tint all around
Last edited by OmahaRumble; 12-05-2012 at 03:03 PM.