OnyxCobra

I found this...

MUFFLER SHOOTOUT:

Results based on 5.0 Mustang Magazine December 2002 issue (page 55). Test car is a ’90 Coupe with 370 HP and 11 second potential. A number of 66 pulls were made to compile this information. Where does your muffler stack up?

The results in HP order:

1.Flowtech Warlock (open) 374.2 hp/ 333.1 tq
2.Bassani Real Street 373.7 hp/ 333.8 tq
3.Hooker Maxflow 373.5 hp/ 333 tq
4.Borla XS 373.3 hp/ 332.6 tq
5.Magnaflow 372.8 / 332.5 tq
6.MAC 372.3 hp / 331.5 tq
7.Flowtech Afterburner 372.3 hp/ 330.1 tq
8.Hooker Aerochamber 372.1 hp/ 330.4 tq
9.Bassani 372 hp/ 333.5 tq
10.Spintech 371.6 hp/ 332.2 tq
11.Edelbrock Performer RPM 370.9 hp / 331.3 tq
12.Borla XR1 370 hp/ 334 tq
13.Flowtech Terminator 369.5 hp / 331.3 tq
14.Dynomax Ultra Flo 369.4 / 333.2 tq
15.Flowmaster 369.4 hp / 331.8 tq
16.Flowtech Warlock 366.3 hp / 325.3 tq
17.No muffs 365.2 hp / 330.1 tq


But again, you buy the exhaust for the sound you like, not the HP gain.

92hatchLX

The results would be different with stock or near stock 5.0. I didn't see the SLP's on there but I think that I'm still going to get that SLP cat-back.

marx91

flomasters are low on the list but you cant beat the sound of 'em IMO
i'll take the loss of a few hp

Tims 88GT

^^agree me to

grabbem88

thanks onyx.......but guy's you can't feel 3-5hp this felt like a 20hp gain...and buy what was stated i should have lost hp not gain it...

OnyxCobra

it might just feel faster because how loud it is. i think ud be more likely to gain hp by removing ur muffs with a really high hp car..

and yeah i would think SLP would be pretty high on that list, usually the resonators do better than the chambered muffs

grabbem88

then why was i blowing the clamps off at the dyno...

OnyxCobra

im sorry, come again?

grabbem88

for the o2 widebands...they blew off on almost every run......

grabbem88

so what should i get? borla xs or bassani real street?