Everything I have read says those two mods increase hp and performance. Not drastically but some.why do you say it doesn’t help? And yes sound.
Where did you read that? The internet? :-/
No really, I spent over $2000 in CAI, Cat Back and larger throttle body, headers and an electric fan. I was looking for more Hp and mpg.
Many jeep veterans were right when they said its all smoke and mirrors. Rubbish and down right lies.
The cold air intake will show 1-2 mpg improvement for 500 miles. That is when the PCM learns the new fuel trims and poof its gone. You are left with the cool noise.
From 2003 forward factory exhausts are better headers than you could buy. Mine did nothing but crack a number of times. The wider bored throttle body only made the skinny pedal more responsive.
The cat back gave a better sounding exhaust. No hp or mpg.
The only worth while thing was an electric fan over the clutch fan. Even though the fan power requirements kick the alternator in and you get near zero gain. It turns out driving at or above 30 - 35 mph does not require the fan to kick on. The natural flow of air through the radiator is enough. And this frees up engine load for HP or mpg cause you dont press down as hard.
Also if there were a magic hp adder wouldn’t you think jeep would be adding it. Keep up with the 30-45mpg vehicles.
Chips are another fail. They cause a rich or lean condition and your CAT and valves pay the price.
Never look down on anyone unless you are helping them up - Jesse Jackson
