Flow rates on OEM 2.7L and 3.2L mufflers

[edevlin]

Does anyone know if the flow rates are the same for an OEM Non-S and a S muffler. I was searching on the site and could not find any information. I would think that the 3.2 motor would require a higher flow rate than the 2.7.

The reason I am asking is that I would like to have a higher flow rate on my 2.7L exhaust system which is running headers and high-flow cats, but with my stock 2.7L muffler.

BTW, I have had my Boxster in the shop for a week, I will be picking it up tomorrow. It is having Bilstein PSS9 suspension installed, I cannt wait....

Ed

[986Jim]

Both mufflers would have enough cfm for either motor, so I doubt there is much change between teh S and non-S muffler. Somebody please chime in if there is. I'll bet that it's just the tips that are welded on which make the difference.

I understand wanting to keep the quiet muffler so it's not so noisy, a Dansk muffler would do a pretty good job of that, but they are expensive as well... In the test on the 2.5L the aftermarket muffler which was straight through only picked up 6hp and 1 ft/lbs of torque, so if the S muffler does have slightly higher fow, it won't be straight through so the gains if any will be pretty well non-existant.