are there any power gains from 3" to 3.5, or 4" exhaust?

thinking about making one w/ some stainless and maybe a bullet muffler


couldnt find much about it though my hks exhaust seems to be restrictive and seeing aaron's car make a sig amount of power by changing the muffler???

any ideas

 

under 850hp probably not. stick with 3.0

 

The only time I would upgrade from 3" exhaust is when I hit over 600 whp. I heard that a 3.5 inch exhaust is good from 600+ and a 4" is 1000+ I think anything over a 3'' is too much

 

THIS is what i thought... im at 711 and mine seems a lil restrictive and actually quiet i think ill log a pull w/ current exhaust then make a 3.5" one and log it and put it into the virtual dyno w/out any tuning and see if it does anything and if not ill chalk it up to learning experience haha


i hate quiet cars

 

You will also be adding some extra weight with the 4 inch one

 

Unless if it's titanium or aluminum.

 

wonder if aluminum would hold up ok with egts an all over the long term

 

im no exhaust expert, but from my understanding 3 inch is plenty good for most applications. since your over 700whp, you might see some gains from a 3.5. be interesting to see a back to back log, so i think you should do it!

4 inch is supra quad digit HP. i would stick with a 3.5 max, but hey what the heck do i no haha

 

yea i fig 3.5 would result in the best results 4" is overkill if you ask me just wondering if anyone had been down this road b4

 

BR, 3" turbo back, two mufflers, 9.04 at 159.64. A good 3" is enough.

 

im rocking 4 " turbo back but then again some may not like it. I love it tho

 

I got a 3.5" with 785hp and it works well. Not a bunch of gain but its piece of mind for more power in the future.

 

A nice flowing straight-through 3" should the job well if you're under 600hp imo.

 

well since my car will be under 600 for the time being and his is over 700 we shall just build 2 and log both back to back