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SLP Loudmouth II Cat-Back Exhaust - Dual Side Exit (04-08 5.4L)

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

$383.95 (kit)

FREE Shipping
  • Item T81000B
  • MPN# F31070

Will this fit your F-150?

Features & Details

  • Dual Side Exit Bolt-On Cat-Back Exhaust
  • Increases Horsepower and Torque
  • Y-Mid Pipe
  • 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
  • For SuperCab with a 6.5 ft. Bed and SuperCrew with a 5.5 ft. Bed
  • Fits 2004-2008 5.4L F-150s
New Sound Levels. Take your truck's sound to an all-new aggressive level when driving around wtih this SLP Loudmouth II cat-back exhaust kit. It features wide tubes that are split into dual pipes at the end with wide 3.5" tips for the most aggressive sound possible. When you use this exhaust setup you'll enjoy deeper tones and louder notes when driving around.

Serious Power Boost. When you rely on this kit you don't just change the sound of your truck, you can also add more power to it. That's right, when you add this SLP Loudmouth II cat-back exhaust you can bump the power levels by as much as 10 HP. That's not huge, but this exhaust setup makes your system more efficient and lets your engine run the way that it should. That's a huge benefit.

Long Term Durability. Unlike some of the kits sold on the market today made from coated steel, this one is made from full stainless steel. The pipes, and the muffler and tip are all made from top-grade T-409 stainless steel. That material is rated to last for years without rusting or corroding. You can use your truck in snowy and icy areas and still enjoy reliable exhaust pipes and a muffler.

Installs Quick. With this kit you shouldn't spend any more than 2 hours putting it into position. At the most you would have to take an additional hour if you aren't familiar with the system. The kit locks onto the existing mounts and all the hardware is included. If you really aren't sure what to do you could pay a professional as well.

Application. This SLP Loudmouth II Dual Side Exit Cat-Back Exhaust System is designed to fit 2004 to 2008 5.4L F-150s with the following cab and bed sizes.

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

    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

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

    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

    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

    Exhaust

    Minor modifications but overall easy install wish it had more hangers

    MichaelG

    Year: 2007

    Helpful (0)

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