Free Shipping On Orders Over $75. Details

Talk to an F-150 Expert
Mon - Sun, 8:30 AM EST - 11:00 PM EST
Win $17,760 For Your Truck! Enter Now!

SLP Loudmouth II Dual Exhaust System - Middle Side Exit (04-08 4.6L F-150)

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

$383.95 (each)

FREE Shipping
  • Item T81000A
  • MPN# F31070

Will this fit your Truck?

Ship to: ASHBURN - 20146
Sorry, please enter a valid US or CA postal code
We're sorry, zip can't be updated at this time.
    Create a list
    Add to New List

    Saved - View your saved items

    We're sorry. We couldn't save this product at this time.

    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
    Tech Specs
    Will it fit my F-150?

    People Who Bought This Item Also Bought

    Customer Photos

    You Might Also Like

    Q & A

    No questions about this product yet.

    Ask the First Question

    More Products You Might Like

    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 Engine: 4.6L V8

      Helpful (1)

    Related F-150 Categories