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Alright guys so I'm looking for my next hp/torque adding mod, right now I have a K&N cold air intake, diablo tuner, and dual 40 series flowmasters mufflers, any guidance or advice and what my next step should be?
 

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Hmm, and what kind of gains are you expecting from that? Does it really make a significant differance?
You won't really gain anything. Maybe a little bit better throttle response that's a bout it. The stock one is fine for bolt ons. When you go FI is when you need to upgrade the throttle body due to the added air.
 

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It's not for more power its for better response when u put ur foot down
Ya well the throttle response will be a little bit better but not a huge difference. For the money I don't think it's worth it. I would put money towards things that will actually be a good HP increase
 

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Actually I really have, I'd love to put 4.10s in it but the only thing is, it's my daily driver and I do a lot of highway driving, eventually once I get a gas saver car that will defiantly be on the list!
I had 4.10' in my 02 auto gt and loved it didn't really care about top end because I never needed it. If you're worried about loosing 1-2mpg then get 3.73
 

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Such as what?
Gears. You'll enjoy them a lot more and it will wake your car up. The stock gearing sucks

---------- Post added at 05:16 PM ---------- Previous post was at 05:14 PM ----------

I heard the best gears to go with for both performance and mpg are 3.91 gears
Ya 3.91s are good but at that point you might as well just go 4.10. The performance will be better and honestly between 3.91 and 4.10 there is going to be pretty much no difference in mpg. Maybe very minimal. Unless you plan on a supercharger down the road I would go 4.10.
 

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I would go with the long tube headers and x-pipe. Then probably the gears...I'm runnin' 4:10's and really like'em. Yeah they drop mpg if you're using your lead foot...lol, but it doesn't change really terrilbly if you're careful. My next big upgrade before I jump into the engine is gonna be a six (6) speed trans and one (1) piece driveshaft.
 

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Gears are the most significant increase you can feel, besides superchargers. I have 4.10s and I get 25.8 mpg (got 23.5 before I added the CAI though) going 70. Every once in a while I wish I had gone with 4:30s (I got greedy with the extra power jumping from 3:55s to 4:10s), but I dont want to be at 3K rpms going 70.
 
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