(approx) 2 Hours
Light to Moderate mechanical skill required.
- Customer Submitted:
- SLP Modular Muffler Installation Guide
The SLP Loudmouth Shotgun Style Resonators would be a great choice for any Mustang owner really who is looking to create their own custom exhaust setup, or more specifically, for the '79 to 2004 cars using an existing SLP Exhaust System and and want to replace a damaged resonator or muffler as these will be a direct fit. Now, SLP does include two hand-polished 304-grade stainless resonators for right around 160 bucks and the install will vary depending on your setup. So, let's just go middle of the road, two out of three wrenches on the difficulty meter and a couple of hours from start to finish to be on the safe side. So, right off the bat, I would say the most popular application for the SLP resonators here will be as an affordable solution to give your Fox or SN95 a little bit more rumble by cutting out those factory mufflers and welding these guys into place. That's very evident in the customer review and photo section as well as on YouTube where any search of the SLP resonators will immediately turn up dozens of New Edge GTs sounding off with this particular setup. And I have to admit, guys, I think it sounds pretty awesome, very deep, very aggressive, even with those factory manifolds and cats in place and gets just downright dirty with a set of long tubes or an aftermarket mid-pipe.But on the other hand, if you already have an existing SLP cat-back on your V8-powered Fox or SN, whether it be the Loudmouth or the Loudmouth II, these will be a direct replacement for the existing resonators if you ever need to swap them out for whatever reason, maybe you hit something on the road, scraped them up, whatever the case, this will be an easy and direct swap.Dimensions for the resonators themselves will be just over 18 inches in total length with a 4-inch body diameter and that will allow them to be used in some pretty tight spots underneath the car. Inlet and outlet will be both 2.5-inches and they will be straight through by design, eliminating a big chunk of restriction otherwise caused by a traditional chambered muffler. Finally, guys, these things are made from premium 304-grade stainless steel and will be sold in sets of two. As far as your installation is concerned, well, again, guys, it will go down in one of two different ways. Now, if you're replacing an existing resonator or muffler on an SLP cat-back, it's gonna to be a piece of cake, right? Just simply loosen up the clamps, swap them out, and you're good to go.On the other hand, if you do plan on incorporating these in place of a set of factory mufflers, then there will be some cutting, there will be some welding involved, which will stretch the time and the difficulty of the job. Because of the differences in install here, guys, the site's just gonna go middle of the road two out of three wrenches on the difficulty meter and a couple of hours from start to finish. But if you're looking to go custom and create your own system, or just replace a set of mufflers or resonators on an SLP cat-back, the Shotgun style resonators here will be an affordable solution and you can grab your pair right here at americanmuscle.com.
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Fitment: 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004
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March 29, 2020
it sounds loud!!
if you want your car to sound loud this is the item for youHelpful (0)
December 22, 2019
Woke up my Mach 1 sounds amazing! Took it to my local muffler shop to have them installed.Helpful (0)
December 17, 2019
These things sound so good! They need to be welded on. I could not get them so I took them to a shop insteadHelpful (1)
December 13, 2019
I have a v6 dual exhaust but this sounds great it has the pop and sound I wantedHelpful (0)
November 09, 2019
Went from off-road h pipe with flowmasters super 10’s to these and man what a difference. The car woke up, sounds mean and pops like crazy rev matching. Definitely recommend For your 2vHelpful (2)
October 10, 2019
As soon as these slp resonators were installed in replace of my stock mufflers, you could tell the difference.Helpful (0)
September 26, 2019
SLP loudmouth reanators
My neighbors can hear my car growling down the street with these. Best for high school students and college students on a budget. loud enough but not obnoxious.Helpful (0)
September 13, 2019
Screams rite out of the X pipe!!! Had to get some tail pipes to reduce volume, has a wicked Rap at 1900rpm! And screams at 5!Helpful (2)
August 28, 2019
Have these with a h pipe and the rest stock people always say its a stock v8 and i switched my flow masters 40 for this loudmouth amazingHelpful (1)
July 30, 2019
I love the sound note
They sound great I love the sound I would recommend this vehicle to anyoneHelpful (1)
Bone stock exhaust I have a bone stock exhaust. I do not have the money to buy a whole catback exhaust and have it installed. So I was wondering if getting these will make enough difference in sound on a stock catback or is it a pointless buy?
It would not by any means be pointless, replacement of your stock mufflers is always a plus for performance. However if you do not have the equipment, you would still need to take these to a muffler shop to have them cut away the stock mufflers and replace them with these but if you check around you should be able to get these installed for no more than $100 bucks, and it will sound just as good as buying the setup that bolts from the mid-pipe back. I have the SLP setup and I love it, FYI. I will not go back to flow master after experiencing the sound these babies put out.
I have a 02 Mustang GT with forged internals, trickflow stage 2 cams, 24lbs injectors, ford performance i take manifold, 78mm BBK throttle, BBK cold air intake, long tube headers, true dual with flowmaster 40s series, aluminum pullies, aluminum driveshaft... i was thinking installing a x pipe with the slp... the slp will make my mustang sound louder and agressive? And the cams are still going to sound nasty?
The SLP Loudmouth Center/Center Shotgun Style Resonators will make your car sound louder and the cams will still sound nasty yes!
I have a stock 04 Mach 1 with these simply bolt on with clamps to the stock pipes?
The SLP Loudmouth Center/Center Shotgun Style Resonators would not be a direct bolt on replacement for stock mufflers, as the stock mufflers will have the inlet and outlet offset on different sides of the muffler case. Modification to the existing exhaust would be required to install these mufflers.
I have a Borla system on my 03 Terminator right now, O/R X pipe and Long tubes. If I just swapped the Borla mufflers out for these would I need a re-tune? Wouldn't think so but doesn't hurt to ask. Thanks
No, these mufflers will not require you to retune your Terminator with long tubes. The current tune for your modifications will be perfect.
Can i use these on my 08 mustang gt I had them on my 96 gt and i love the sound
Unfortunately I would be unable to guarantee fitment on a 2008 Mustang GT. Though these have universal fitment, they are designed to fit 1979-2004 Mustang models only.
The SLP Loudmouth Center/Center Shotgun Style Resonators will fit on your 89 Mustang.
Hi, These SLP Loudmouth Resonators - Pair can be installed on most exhaust systems they will need to be cut and welded in place.
The loudmouth 2 won't be as loud as the 1.
lnststall will vary based on the exact model year and exhaust system being used, but they can be welded on.
These offer a universal fitment so it's possible modification will be required for proper fitment, however if your current exhaust is 2.5 inches in diameter it will make this installation process more straightforward.
(approx) 2 Hours
Light to Moderate mechanical skill required.
What's in the BoxHardware included: