Cat back, and "cold air intake" will net you nothing. But, it will sound better.....

Hammer is correct. Best bang for the buck is tuner, followed by the HS 1.7 rockers. Headers, and a free-flow cat would be next. And all of that might get you 30-40 horsepower...... (and worse gas mileage. )

 

Out of those four options what one is the worst on gas? Im gonna say the HS 1.7 RR.

 

And keep in mind that increase of 40hp is not fully realized until 4000rpms. At 2500rpm you're seeing half that. Not trying to discourage you, only inform of what you're buying.

 

That pretty much sums it up! Reply #10 is what all new 2nd geners want to know.

You know you should have your own thread, call it " Hammer Time " LOL!

 

Since you asked about a Cold Air Intake, I'll give ya my 2 cents on that.

They do NOTHING on a stock truck and I've seen dynos prove this. Reason being is the stock intake already takes in more air than stock throttle body, intake manifild, etc. can use as it is. The "Cold" air intakes as 99.9% of the people are talking about should be called "More Air Intakes" as they are still located in the engine bay. Yeah, some are positioned farther in the wheel well, but by the time the air reaches where it's actually mixed with fuel, that temp difference is marginal.

Now there ARE times where you benefit from the greater surface area a cone filter in a CAI nets you. If you've got a bigger or ported TB, modified runners in the manifold, cam, heads and headers THEN you'll be able to utilize that extra air. You'll also need a custom tune or a dedicated A/F controller like an ARC1 or you're gonna lean out.

Now if you want one for a little better sound or maybe a 4-5* difference in air temp at the MAF, then sure. It won't hurt anything. But unless you're gonna do $3,000+ in other related mods - any "butt dyno" gains are gonna be via placebo effect.

And before it comes up, don't even ask about a throttle body spacer or these "tornado" type deals. If someone can show me how adding turbulence to the air on a modern fuel rail system can benefit in any way, I'll buy them something nice...