New Mustang owner
8/4/11, 11:14 AM
#3
Cobra Member
"Cats" are Catalytic converters, the factory ones are very restrictive. A cat-back exhaust usually has a new X/H pipe and free flowing cats. Axle-backs are new mufflers, or muffler deletes. Axle-backs add better sound, Cat-backs add to sound and performance. Need a tune to take full advantage of it. Cats are required in the U.S.....but not all of us follow that rule. Some states use a sniffer to make sure you are legal, some just look for cats, some don't care so much.
Grats on the car, and welcome to TMS.
Grats on the car, and welcome to TMS.
8/4/11, 07:33 PM
#6
Tasca Super Boss 429 Member
Join Date: September 28, 2007
Location: Midlothian, Va
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Originally Posted by Planeswalker
"Cats" are Catalytic converters, the factory ones are very restrictive. A cat-back exhaust usually has a new X/H pipe and free flowing cats. Axle-backs are new mufflers, or muffler deletes. Axle-backs add better sound, Cat-backs add to sound and performance. Need a tune to take full advantage of it. Cats are required in the U.S.....but not all of us follow that rule. Some states use a sniffer to make sure you are legal, some just look for cats, some don't care so much.
Grats on the car, and welcome to TMS.
Grats on the car, and welcome to TMS.
Ours also don't need tunes, for really anything, unless you want one but just tuning for an exhaust won't do anything for you.
Last edited by 1999Pony; 8/4/11 at 07:35 PM.
8/4/11, 07:55 PM
#7
Cobra Member
You don't NEED a tune for those, but a tune alone gives 20 RWHP. A tuner and lifetime tunes from AM is cheaper than the parts, so why buy any performance parts if you can't make the most out of them
8/4/11, 08:34 PM
#8
Tasca Super Boss 429 Member
Join Date: September 28, 2007
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Originally Posted by Planeswalker
I had a SN95 and 2 New Edges, always forget that the mufflers are back there, still consider it axle back lol.
You don't NEED a tune for those, but a tune alone gives 20 RWHP. A tuner and lifetime tunes from AM is cheaper than the parts, so why buy any performance parts if you can't make the most out of them
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