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Old 10-11-2016, 04:51 PM   #1
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Question Exhaust

I have a 4.6 97 GT convertible and I have removed the cats.(not illegal here in NZ).I have now just the stock axle back mufflers.It sounds like a V8 now but loud.What can I add or change to reduce the volume but keep the V8 thunder?
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Old 10-11-2016, 05:03 PM   #2
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I'd be tempted to ditch the stock mufflers and go with a name brand performance muffler. Magnaflow, borla, flowmaster, etc. Welcome to the forum.
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Old 10-11-2016, 05:12 PM   #3
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Resonator.


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Old 10-12-2016, 06:07 AM   #4
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Yes I think I will go with Flowmaster Super 44,s.It sounds mean without the cats.Lots of crackle and pop.Not sure whats in the stock mufflers,probably glasspack old school.
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Old 10-12-2016, 06:42 AM   #5
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What kind of mid pipe do you have?..


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Old 10-13-2016, 02:46 AM   #6
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H pipe
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Old 10-13-2016, 02:48 AM   #7
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Oops Looked under the car the other day and my stock mufflers are actually cat back not axel.My bad
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Old 10-13-2016, 03:55 AM   #8
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Exhaust

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H pipe

If you want more V8 Rumble, then go with a Chambered Style muffler with that H-pipe!.. Something like FlowMaster!..


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Old 10-13-2016, 04:34 AM   #9
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Yes.I think Super 44's will do the trick.
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Old 10-14-2016, 06:52 AM   #10
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Original Flowmaster 40s sound awesome with an off road H pipe. This is set up I have on my 03 currently. It sounds good and clean. Classic "Mustang" sound! Deep and throaty at idle, sounds great without being too loud at cruising speeds and scream when WOT. I have an off road X pipe with Magnapacks on my 96 and its loud all over the place I still like it but prefer the H pipe and chambers now in my older age.

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Old 10-14-2016, 07:44 AM   #11
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Steve, you still have the catalytic converters on?


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Old 10-14-2016, 07:56 AM   #12
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Off road means no converters.


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Old 10-15-2016, 06:22 AM   #13
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No I do not. I dont believe in them, JK. On both of mine Im off road= no cats. Check engine light kicks on unless you have MIL eliminators or a tune to trick the 02s. Ill be getting a tuner over the winter for the spring.

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Old 10-16-2016, 03:29 AM   #14
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No cats

I had the 6 cats taken out and we just remounted the O2 sensors in the straight pipe blow the manifold and
had no check engine light issue.No re tune or computer tricking required.The O2 sensors don't really seem to care if the cats are there or not.This is on a 97 GT
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Old 10-16-2016, 01:22 PM   #15
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my 96 has an offroad x with magnapack mufflers and it sounds awsome. loud not not insane at idle and low rpm but when it opens up it completely changes its tone and gets very loud
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Old 10-18-2016, 09:29 PM   #16
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This is how mine is. It seems to get louder with age or maybe its me getting old? But OR X with Magnapacks makes for a nice sound!

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Old 10-18-2016, 09:31 PM   #17
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O2s making the light come on or not on are really not an issue unless the light really annoys you. I just see it as a common thing in my car

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Old 10-19-2016, 07:08 AM   #18
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the offroad x with magnapacks has a nice idle and cruise sound that won't kill you but when it opens up it gets noisy. if you have your windows down and pass a car at WOT it sounds amazing. I think I want either slp loudmouths or dynomax bullets though
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Old 10-19-2016, 06:37 PM   #19
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I had LM 1s and I hated them! Had them on long enough to get the Magnapacks ordered-shipped-and welded in.

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Old 10-19-2016, 08:41 PM   #20
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Quote:
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I had LM 1s and I hated them! Had them on long enough to get the Magnapacks ordered-shipped-and welded in.

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Where did you get the magnapack mufflers without the catback?

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Old 10-20-2016, 10:05 AM   #21
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I like my slp resonators..


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5 speed manual
Full bolt ons
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395rwhp 500rwtq
11.8 @ 115
7.5 @ 92
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Old 10-21-2016, 05:51 AM   #22
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I loved mine with the cats on. Once the cats came off it was hands down one of the worst sounds I've ever heard. They very quickly got swapped for Flowmaster. Had I left the cats on the SLP Loudmouths would still be on the car.

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Old 10-22-2016, 03:51 PM   #23
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what did you hate so much about them?
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Old 10-23-2016, 12:19 AM   #24
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They pop and rasp like crazy, no tone to the exhaust just noise! Sound reminds me of a semis jake brake...or a 1983 chevy truck with a half way blown out glasspack

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Old 10-23-2016, 12:20 AM   #25
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Where did you get the magnapack mufflers without the catback?

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Sorry just saw this. I got them on Amazon IIRC. They were like $179 or something for the pair but that was like 3 or 4 yrs ago

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Old 10-27-2016, 04:17 AM   #26
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Off road x pipe & Flowmasters on mine. Get lots of compliments.
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