3" Diameter Exhaust for Supercharger

[WOLFMAN]

Hi to all to those with Superchargers fitted or not.
I have a FR/Roush stage 2 supercharger fitted 720bhp. I have Kooks headers fitted as well and understand I would require 3" pipe diameter to help with gases going out. I have Ford Racing by Borla pipes and resonator and a gt350 valance with quad axle backs. Any suggestions/advice on transforming the system to 3" and keep the ford racing quad valance.

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[Manders Mustang]

cut it up and replace all the pipes with 3 inch?

 

[WOLFMAN]

It's not only the pipes but the rear boxes need 3" in and out as well as the resonator box. So many systems do 3" but try fitting them to FR/Borla system then the fun begins. Will call it when finished a 3" FRANKENSTEIN system.:lol:

 

[Enoch]

It's not only the pipes but the rear boxes need 3" in and out as well as the resonator box. So many systems do 3" but try fitting them to FR/Borla system then the fun begins. Will call it when finished a 3" FRANKENSTEIN system.:lol:

I wouldn’t bother... the gains will be very small

 

[Cobra699]

Magnaflow do a 3 inch exhaust system !!

 

[v8hgt]

It's not only the pipes but the rear boxes need 3" in and out as well as the resonator box. So many systems do 3" but try fitting them to FR/Borla system then the fun begins. Will call it when finished a 3" FRANKENSTEIN system.:lol:

Not convinced that the boxes need to be as big. As the gasses pass down the exhaust they cool and become denser therefore requiring less volume per unit of length in the pipe. Having big headers and mid pipe is all good but by the time it gets to the rear axel i bet dripping to 2.5 inches will have zero effect on power.

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