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SLP Loudmouth II Cat-Back Exhaust - Dual Side Exit (04-08 4.6L)

Market Price $434.99 You Save 12% ($51.04)
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$383.95 (each)

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  • Item T81000A
  • MPN# F31070

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Features & Details

  • Dual Side Exit Bolt-On Cat-Back Exhaust
  • T304 Stainless Steel Construction
  • 2.5" Mandrel-Bent Tubing
  • 3.5" Polished Slash Cut Tips
  • Dual Side Exit Design
  • Deep Exhaust Sound
  • Bullet Mufflers
  • Bolt-On Installation
  • Limited Lifetime Warranty
  • Fits 2004-2008 4.6L F-150s
  • For SuperCab with a 6.5 ft. Bed and SuperCrew with a 5.5 ft. Bed
Deep Sound, Boosted Power. If you're seeking solid power gains for your 2004-2008 4.6L F-150 pickup, along with a deep, aggressive, pleasing exhaust rumble similar to a race-tuned muscle car, then the SLP Loudmouth II Dual Side Exit Cat-Back Exhaust System fits the bill in every way. The 2.5" mandrel-bent tubing, and free flow design let the exhaust fly out freely, unleashing approximately 10 HP and 10 ft/lbs of Torque. The exhaust note is the real heart of this SLP system. The noise level of the Loudmouth II is lower than that of the original Loudmouth, but still generates a deep, fierce, throbbing rumble that makes everyone sit up and take notice when your F-150 arrives.

Cutting Edge Modular Design. SLP builds the Loudmouth II Cat-Back out of tough, corrosion-resistant 304 stainless steel. The 2.5" exhaust tubing and two stainless steel SLP-embossed bullet mufflers provide a power generating free flow design. The mufflers produce a deep, aggressively tuned rumble, but are built to prevent annoying cabin resonance. A modular setup enables swapping the resonators out for louder Loudmouth resonators if desired (sold separately). Long, sleek 3.5" double-walled exhaust tips feature a slash cut design, a high polish and can even be rotated to different angles for different looks.

Bolt-On Fitment. Installation of the SLP Loudmouth II Exhaust System usually takes less than 2 hours using hand tools, due to its bolt-on design. All hardware is included with this Cat-Back Exhaust, and requires no cutting or welding for installation.

Application. The SLP Loudmouth II Dual Side Exit Cat-Back Exhaust System fits 2004 to 2008 4.6L F-150s with the following cab and bed sizes.
  • SuperCab with a 6.5 ft. Bed
  • SuperCrew with a 5.5 ft. Bed

Fitment: 2004 2005 2006 2007 2008 Details

What's in the Box
  • (1) Y-Assembly
  • (2) Bullet Mufflers
  • (2) Tail Pipe Assembly
  • (6) Clamps
  • (2) Polished Tips
Installation Info
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Customer Reviews (1) Write a Review

Overall Rating 5.0

out of 5 stars

Installation Time:Less than 1 Hour

  • Loudness / Volume 5 5
  • Exhaust Note 5 5
  • Fit & Finish 4 4
  • Bang For Your Buck 5 5

  • 5/5

    Installation Time: Less than 1 Hour

    June 11, 2017

    Sounds great!

    Sounds a lot better than I was expecting and after the upgrades my exhaust got a more aggressive deep tone to it. Great exhaust!


    Year: 2005

    Helpful (0)

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