Name: 2009-2014 F150 FLOWMASTER Force II Dual-Exit Dual Rear Cat-Back Exhaust System
Brand: Flowmaster
SKU: 817478
Price: 1177.95 USD
Availability: InStock

Flowmaster Force II For Milder Exhaust Tone

Not everyone wants an exhaust system that's going to pulverize your eardrums or annoy the heck out of your neighbors. If you're looking for a deep, throaty sound and gains in horsepower then the Flowmaster Force II Cat-Back is one of your best options. This kit comes backed by Flowmaster's legendary name, and instantly gives your Ford F150 a nice bump in overall performance on top of a great sound that's not too overpowering.

Mandrel-Bent Tubing with Either Dual Rear or Dual Side Exit

Flowmaster's Force II exhaust systems offer a more Moderate Exterior Sound Level, than other product line-ups they offer, which frees up stock restrictions on your system and allows for wicked performance -- all of this with an upgraded tone that lets your F150 rumble and growl when you step on the gas. The Force II System incorporates large displacement mufflers and resonators to control overall sound and increase the performance impression, including more horsepower, torque, and improved fuel economy. This is a great, well-rounded, option if you're looking to get the most out of your truck and gain a custom look.

Fits The Following F150 Trucks:

2009 to 2010 F150 5.4L
2011 to 2014 F150 5.0L

Features and Specifics

Dual Rear/Side Exit
(2) 2.5" Mandrel-Bent Outlet Tubes
(2) 3.0" Polished SS Tips
Extension Pipe
Clamps
Hardware and Hangers

Easy Installation

The Flowmaster Force II Cat-Back Kit comes with all the installation hardware and instructions needed to make this a quick and easy installation (approximately 2 hours using standard tools). The system features a dual rear exit tip design with (2) 2.5" outlets that exit right under your truck's rear bumper to give this system a more unique look than stock. Despite the kit having a dual exit configuration, Flowmaster carefully designed it to bolt right on in place of stock. This kit hooks up to your truck's mid-pipe and comes with an extension pipe that allows this system to fit the (above mentioned) F150 wheelbase configuration. The mandrel-bent outlet tubes help minimize back pressure and restrictions on your truck. The tubes split at Flowmaster's specially-designed Force-II muffler to keep overall volume fairly low while still giving your truck a nice, noticeable rumble.

Check out our install guide of this cat-back kit on our 2012 F150 5.0L FX4 Project Truck!

Write a Review

2014 F150 Supercrew 4x4

The good...sounds great The not so good. The passenger side went right in...using factory hangers. But the 45 tail pipe was just about too short to get the tip securly on the pipe...needed to be about 1 longer. Drivers side...had to cut the cross over pipe to clear the left rear leaf springs so I could get the left tip to match the right side. The hanger supplied was quality but was to long to get the pipe up high enough to match the passenger or stock side. The right side tail pipe came out about 2 inched from the rear bummper, the right side could not be adjusted to match. cut the pipe off 1 .5 inches but still did not get it in toward the wheel to match the right side. Right side has barely enough pipe to get a clamp on it and they still do not line up perfectly. For the money paid...not worth the trouble. 3 hours to tear down and install...and 4 hours to adjust and fit...cut. But with purchaseing some extra hangers and some cutting got it where it looks pretty good...only off by a little side to side. Will go back and spot weld due to clamps not holding tight and very little room to clamp on other places for the left side.

Did you find this helpful? 4 of 5 Found Helpful

Reviewed by: Michael Chunn from USA on 9/6/2014

2014 F150 FX4 extended cab

Have had the system on for several months now and I love the sound and the look. You can make it rumble when you want but it's quite at cruising speed with no drone. The stainless steel double wall tips are awesome. Installation was fairly easy with the pipes going out the back, took about 2 hours on a hoist. Everything fits well. The driver side crossover pipe I did have a little trouble with the clamp not holding tight enough and letting the pipe droop. Took a clamp from the stock system and double clamped it and it holds tight. No big deal and no extra cost. Definitely a 5 star system. I will never use a generic muffler again after having that Flowmaster sound.

Did you find this helpful? 1 of 2 Found Helpful

Reviewed by: Rober Kilpatrick from Colorado on 11/11/2018

Will this system work on my 2009 supercrew 5.5 bed with the 4.6 3 valve?

Asked by: WOOKIE - 12/25/2024

According to Flowmaster the complete fitment on this part number is "2009-2014 Ford F-150 with 4.6L, 5.0L or 5.4L engine. Fits 2/4 wheel drive and all wheelbases. - Moderate sound".

Was this answer helpful? 0 of 0 Found Helpful.

Answer provided by: Joel Galaz (12/26/2024)

Submit an answer

How long are these exhaust tips?

Asked by: Brian2014FX4 - 10/29/2015

The exhaust tips are roughly 12-3/8" long.

Was this answer helpful? 0 of 0 Found Helpful.

Answer provided by: Jason@Stage3 (10/29/2015)

Submit an answer

Is this a stainless system?

Asked by: Kelley - 8/8/2014

Yes, the kit is made using 409 stainless steel.

Was this answer helpful? 1 of 1 Found Helpful.

Answer provided by: Jason@Stage3 (8/11/2014)

Submit an answer

How is the drone inside the cab?

Asked by: Dan '11 5.0 - 5/13/2014

Almost totally non-existent. There's enough sound that you can tell there's something aftermarket going on, but not nearly anything that'll keep you from having a civilized conversation while driving. This kit is pretty mellow, but has just enough extra volume when you step on it for a good sound.

Was this answer helpful? 4 of 4 Found Helpful.

Answer provided by: Jason@Stage3 (5/13/2014)

Submit an answer

Have Questions?

Stage 3 Rewards is our free customer loyalty program. Earn points on every order and redeem for cash off your next purchase.

100 bonus points just for signing up ($2 to start)
1 point per dollar spent on every order (2% back)
Bonus points for reviews, birthdays, and social shares
Redeem for $10, $20, $30, $50, or $100 off coupons

See full program details

WARNING: Cancer and Reproductive Harm

This product can expose you to chemicals including those known to the State of California to cause cancer and birth defects or other reproductive harm.

For more information, visit [www.p65warnings.ca.gov](https://www.p65warnings.ca.gov).

2009-2014 Ford F150 Flowmaster Force II Dual-Exit Cat-Back Exhaust Kit | 817478

Flowmaster Force II For Milder Exhaust Tone

Mandrel-Bent Tubing with Either Dual Rear or Dual Side Exit

Will this system work on my 2009 supercrew 5.5 bed with the 4.6 3 valve?

How long are these exhaust tips?

Is this a stainless system?

How is the drone inside the cab?

Pick Up Where You Left Off