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SLP Loudmouth II Dual Exhaust System - Middle Side Exit (04-08 4.6L)

Market Price $434.99 You Save 12% ($51.04)
Starting At

$383.95 (each)

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  • Item T81000A
  • MPN# F31070

Will this fit your F-150?

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
Will it fit my F-150?

Most Helpful Reviews

5/5
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!

Helpful (1)

4/5
Nice

Nice exhaust for the money pretty simple install good fit

Helpful (1)

Overall Rating 3.8 out of 5 stars
Read All 4 Reviews

Customer Photos

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2 Questions / 1 Answers

Ask a Question

Does this product include exhaust hangers or would fabrication be needed?

bahlakay

  • This exhaust will not include hangers and modification will be required for proper installation and fitment.

    KevinD92

Helpful (0)

can this be made to fit my 2004 standard cab 6.5 box 4x4 with the 5.4 motor or can I just purchase a muffler to fit the cat-back system I have now ?

oldster

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Customer Reviews (4) Write a Review

Overall Rating 3.8

out of 5 stars

Installation Time:Afternoon

  • Loudness / Volume 4 4
  • Exhaust Note 4.75 4.8
  • Fit & Finish 4 4
  • Bang For Your Buck 4.75 4.8



  • 4/5

    Installation Time: Afternoon

    September 14, 2017

    Review from SLP Loudmouth II Dual Exhaust System - Middle Side Exit (04-08 5.4L)

    Nice

    Nice exhaust for the money pretty simple install good fit

    JeremyV

    Year: 2004

    Helpful (1)

  • 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!

    MattC

    Year: 2005

    Helpful (1)

  • 1/5

    Installation Time: Afternoon

    June 11, 2017

    Review from SLP Loudmouth II Dual Exhaust System - Middle Side Exit (04-08 5.4L)

    idk

    the product is nice but be sure to buy long tube headers as well to get under the frame

    BryanM

    Year: 2005 Submodel: 5.4L V8 XLT

    Helpful (1)

  • 5/5

    Installation Time: Less than 1 Hour

    October 30, 2017

    Review from SLP Loudmouth II Dual Exhaust System - Middle Side Exit (04-08 5.4L)

    Exhaust

    Minor modifications but overall easy install wish it had more hangers

    MichaelG

    Year: 2007

    Helpful (0)

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