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SLP Loudmouth I Resonators - Pontiac GTO, Mustang V8 for Sale

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SLP Loudmouth I Resonators - Pontiac GTO, Mustang V8

Price: $139

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marylandspeed Store


Have Questions About this Item?

We are one of the Largest SLP Warehouse Distributors in the country, and are known for our unmatched customer service!

Call us at 443-730-9428

Pictured: SLP PT# 31062

Click Here to View Our Other Items!


Shipping is viaUPS Ground and includes Free Insurance!

Payment Options-

We accept Visa, Mastercard, Discover, American Express, or Paypal

State Sales Tax-

Maryland Residents must add 6% Sales Tax.

If purchasing this item for custom applications (i.e. anything besides bolting this to an SLP loudmouth system), please verify fit before purchase. Restocking fee will apply to all returns.

SLP 2.5" Loudmouth I Resonators (pair)

This item is a pair (2) ofthe high flow resonators that come with SLP's famous Loudmouth I Modular kits for the Pontiac GTO, Mustang GT, and 5.7L Charger/300C/Challenger/Magnum. This is a pair of resonators only, and can be used for people who already have the modular Loudmouth II system and want the louder Loudmouth I sound, and also, they can be used for custom applications. These mufflers will not fit SLP's F-body Loudmouth Systems.

offer with confidence because MarylandSpeed is one of SLP's largest vendors, and we have been selling on for 3 years with 100% positive response. Quite simply, no other vendor can match us, and our reputation!

SLP Product Information-

SLP PT# 31062

Get maximum flexibility from your modular SLP cat-back with these "Shotgun" race resonators. Standard equipment on many of our Loud Mouth systems, they make it possible to switch between muffled and "wide open" exhaust configurations in a matter of minutes. All resonators are constructed from hand-polished 304 stainless steel and embossed with the classic SLP logo. NOTE: Sold in pairs. May also be used in the fabrication of custom exhaust systems (4" body, 2.5" inlet, 2.5" outlet). Does not fit 3" F-Body system. Measurements:

  • 2.5" ID/OD
  • 4" body diameter
  • 18-3/16" overall length

Please verify fitment before ordering if using these for custom exhaust, or to weld on to your stock exhaust. For instance, these mufflers will weld on a stock 2005-06 GTO exhaust pretty easy, however they will not fit a stock 2004 GTO, Mustang, or LX exhaust without modifications to to the stock tubing.

Why are these called resonators?

This resonator has zero restriction or packing inside. Basically, it looks like a muffler, but is essentially a stainless steel case with no packing.


If purchasing this item for custom applications (i.e. anything besides bolting this to an SLP loudmouth system), please verify fit before purchase. Restocking fee will apply to all returns.

This Item is Brand New in Factory Packaging!

We are a warehouse level SLP Dealer. That being the case, you get SLP's full limited lifetime warranty, and customer support with your order. SLP's warranty can be found HERE!

International Customers-

At this time we do not accept purchases from international customers, nor do we ship outside the United States.

Please do not offer on this item unless you reside in the United States, and it is being delivered to a stateside address! Additionally, we do not ship to freight forwarding depots/boxes, or brokerages who will export the part after we send it.

Please do not offer on this item unless it is being delivered to an address in the United States! NO EXCEPTIONS!

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