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4.7 Mods Suggestion - Performance

65K views 73 replies 26 participants last post by  2023.miller.pr 
#1 ·
Just curious on anyone's suggestions for the first round of modifications for my 2007 GC 4.7. I'm thinking air intake and exhaust for a quick 20-25hp. Any tips from your efforts?:confused:
 
#52 ·
where did you buy your cams for your 4.7 thank you
 
#4 ·
how much scott
 
#6 ·
Buy the cams....
 
#7 ·
I have a K&N intake, magnaflow muffler but I doubt you will see 20HP from them alone, you might get 20-25 if you do those mods and a Superchip. The intake and exhaust make it sound faster so it seems faster to me and most people who see it. =D I might not be the fastest car out there but my 05 4.7 sounds badass!
 
#14 ·
Yes add a magnaflow I just put a 8x5x14 on mine sounds so nice now. As far as performance maybe few HP.

Sent from my Evo 4G
 
#17 ·
The cams can be found dirt cheap from Henson.

If you dont want to tear into the motor, a intake, 3" exhaust w/ high flow muffler of your choice, and a bigger TB of your brand preference is a solid start, and well within the PCM's ability to understand. The 2003-2007 PCMs arent as forgiving to modifications as the earlier models are.
 
#21 ·
going to piggy back a little... what is the commonly accepted "best" intake for the WK 4.7 right now?
 
#23 ·
but i dont want an oiled filter, right? i want a dry charger?
 
#24 ·
You could go back and forth on the oiled or dry filters all day and into tomorrow. Ive used both on different vehicles...not really noticed any sorts of differences.
 
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