35thAnvMustang

i have a 99 mustang gt auto and i have slp loudmouth 1's on it and i want to get a slp x pipe with high flow cats. i was wondering if anyone could tell me if that would b the best combo or is there anything better to make it louder. i have to have cats on it. also i plan on tinting my windows and i heard that it isnt a good idea to tint the rear window cause of the defroster on the window. is this true? any suggestions would be great.

DreamerGT

The catted x will be good, and I have tint on my back window with not problems. Ive never even herd of the being a issue.

35thAnvMustang

how bad do you think it would look without the rear window tinted? im not that small of a person i cant fit in the back seat lol i mean i can get back there but not comfortably. and id take it somewhere to get it done but im a more diy guy

mrtstang

If you tinted the sides and not the rear it would look retarted! Also there are no issues with tinting the rear window. 1000's of Mustangs have it done!

gunpig0313

Yeah you'll be good with the tint. I have the SLP X-pipe with cats, and Spin Tech supper pro streets it's pretty loud, but I think the loudmouth 1 is louder.

gunpig0313

This was a test done by 5.0 magazine a few yrs ago

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

Sound Off in Quietest to Loudest (Decibels):

1.Borla XS, 80db at idle, 90db at 2,000 rpm, 110db at WOT.
2.Hooker Maxflow, 80db at idle, 90db at 2,000 rpm, 120db at WOT.
3.Magnaflow, 82db at idle, 91 at 2,000 rpm, 114db at WOT.
4.Flowmaster, 82db at idle, 93 at 2,000 rpm, 115db at WOT.
5.Flowtech Warlock, 83db at idle, 92 at 2,000 rpm, 112db at WOT.
6.Dynomax UltraFlo, 83db at idle, 94 at 2,000 rpm, 113db at WOT.
7.Borla XR1, 83db at idle, 96db at 2,000 rpm, 118db at WOT.
8.Bassani Street, 83db at idle, 96db at 2,000 rpm, 120db at WOT.
9.Edelbrock RPM, 84db at idle, 93db at 2,000 rpm, 118db at WOT.
10.Bassani Real Street, 84db at idle, 96db at 2,000 rpm, MAX. (120+db).
11.Flowtech Afterburner, 86db at idle, 94db at 2,000 rpm, 115db at WOT.
12.Flowtech Terminator, 86db at idle, 94db at 2,000 rpm, 119db at WOT.
13.Hooker Aerochamber, 87db at idle, 94db at 2,000 rpm, 114db at WOT.
14.SpinTech, 87db at idle, 97db at 2,000 rpm, 116db at WOT.
15.MAC, 87db at idle, 98db at 2,000 rpm, 119db at WOT.
16.No Muffler, 91db at idle, 103db at 2,000 rpm, MAX. (120+db).
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35thAnvMustang

is it really worth the money to add a cold air intake and a throttle body? i want to get some more hp without spending a lot of money. due to the fact that i have 2 project cars going on

gunpig0313

Yes it would but don't go any bigger than 70mm for the TB. CAI is up to you there all about the same, but get one that goes in the inner fender not under the hood.

35thAnvMustang

gunpig0313 you have a very nice ride. yellow mustangs always look the best. im thinking about getting some nice cobra rims for mine

35thAnvMustang

how come i shouldnt get one over 70 and why one on the inner fender? more of an air flow?