Best flowing catback?

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May 17, 2011 | 01:48 PM

#21

3YLSYKR

On The Tree

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Joined: Apr 2011

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From: SLC, UT

Quote:

Originally Posted by J-Train

Bigger is not always better, flow more yes, but there is something to be said for a little back pressure, depending on mods to the car, 3" may make better numbers than 4"

x2, well said

May 17, 2011 | 02:03 PM

#22

SilverV6Camaro

Launching!

Joined: Mar 2004

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Info on pipe size versus horsepower level. Too big of a pipe might net you some high end horsepower but with too little back pressure you will lose all your bottom end torque.

http://www.magnaflow.com/wideopen/performdata.asp

May 17, 2011 | 02:15 PM

#23

TheSilverOne

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From: Taxachusetts

https://ls1tech.com/forums/2987587-post19.html

Quote:

A 2.75” (stock) single system is good for a 310hp engine with zero loss…
A 3” Single system is good for a 370hp engine with zero loss…
A 3.5” Single system is good for a 503hp engine with zero loss…
A 4” Single system is good for a 657hp engine with zero loss…
A 2.25” dual system is good for a 457hp engine with zero loss…
A 2.5” dual system is good for a 513hp engine with zero loss…
A 3” dual system is good for a 812hp engine with zero loss…

May 17, 2011 | 03:28 PM

#24

MikeWS6

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Joined: Apr 2009

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The LM1 will out flow any muffler because its an empty resonator.

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