2011-2014 F150 Diamond Eye 4" Cat-Back Exhaust Kit (Stainless) K3330S

Great exhaust. Fit perfect, sounds awesome. They're is a little drone at highway speed but it's nothing to drive you crazy. Great system for the price and really brings the 5.0 to life.

Easy to install , and it sounds great ! The Ecoboost is an awesome engine and this exhaust really brings it to life .

Sounds amazing with the 5.0 and most importantly there is little to no drone, only noticeable at 1900 RPMs. Only reason it's not 5* is because I needed to cut a clamp 3/4 shorter to make it fit right but that's the only complaint I have.

Great deep exhaust sound without the rasp. Just what I was looking for. Sound inside the cab is agressive and sounds good on the gas and settles out nicely. Like most systems, there is slight drone at around 1800/1900 but minimal in my experience. Happy wirh my decision.

Additional Equipment: K&N CAI When I first installed this system, I had to readjust the flange several times before it was equally sealed. The stock exhaust manifold has a 3 inch flange and a 2.5 inch pipe, so it takes a bit of time to get it right. When you first start it, it is LOUD. It does mellow out considerably after a few hundred miles, but it echoes and resonates in the cab until then. If you are coming from a stock setup, this is going to take some getting used to. HOWEVER, after ~200 miles, it is almost silent at idle and cruise speeds, roaring to life when I hit the gas. This is exactly what I was looking for when I purchased this exhaust. I am glad I stuck through the break-in period, and I would now (obviously) recommend this cat-back system to anyone looking for that subtle roar on their F150.

I've had it on for a week now and I love the sound of it on my Ecoboost , really brings a little boost of performance along with my AFE CAI. seems like right off the line I get off about the same maybe quicker but when the rpms start increasing u can really feel the extra push. inside the cab it's a little loud, but nothing that will drown out a conversation or music. it sounds louder and a lot more throaty. May wake the neighbors some days but it's not too bad. I can stand around back my house lock the truck and auto start, hear the cold start pretty loud but the sound then dies back down. Mph may have increased by .5-1.0 hard to tell by the way a drive. Installation wasn't too hard to figure out like most say, getting off the stock took longer then installing the new piping, idk what some people say about getting it off by there selves, no lift, no jack, nor jack stands. If your at stock height, there's no way to get the stock exhaust off without cutting it unless it's jacked up. Two men make the job a lot easier and jack stands come in handy when installing the pipes to rest them on the jackstands at a level height. Just my two cents. the stainless steel looks great. I got a 5 black exhaust tip along with this and it looks great. I like being able to see the thick shiny piping going over my axle. Overall diamond eye did good with this product, came with everything needed, and the additional pipe if you have a longer wheel base (which I dont). Thanks stage three. Also there is a great installation video on YouTube just search Diamond eye ecoboost installation and there's a 15 minute video of a deisel shop installing this exact exhaust.

Awesome exhaust fits perfect,took a couple of hours with a buddy to install.Clamps are very good and secure. Sounds great, no drone in cab at highway speeds, good rumble at idle, definitely noticed fuel improvement,1-3 mpg, sounds good when romp on it and you can hear turbos singing!! Best exhaust and the best $

Installed by myself in less than 2 hours. Sounds great, it is a bit loud until it breaks in. Very nice sound, sounds a lot like the video clip stage 3 has on it. It's there and lets everyone know you have a v8 when your accelerating quickly then let off and it's quiet. Very pleased with the exhaust and quality of the exhaust system.

I have a 2010 F150 5.4L. This kit was not made from my engine configuration. However with $15 I got an adapter I was able to make it work. Couldn't be happier with the sound. The tone is very deep. I went from Flowmaster outlaw to this hopes of less highway drown. It worked perfectly. Couldn't be happier with my purchase. Perfect exhaust system.

Great product and the sound is amazing. Perfect fit for my CCLB pickup.

Took about an hour to install. Flange was a little bit of a hassle but well worth the price! This kit fits 2015-2017 fine!

Great exhaust and sound for the price. Just have to make sure the flange is lined up perfectly but all you need is a buddy to help you out on that. Sounds sick

This exhaust has been awesome so far. It has the deep aggressive throaty sound I was looking for but isn't overwhelmingly loud. I have a S&B CAI and tunes from FiveStar but I haven't driven enough to notice much in MPG change yet, if there will be any. Definitely a great buy for the price.

Awsome exhaust, Stainless steel is the best material to use on exhaust systems period! This exhaust is just as free flowing as any other name brand out there. With the use of an AFE STAGE 2 induction I've personally improved 2.5 to 3 mpg on high way

Great exhaust system. It has a bit more of a growl then the stock, but does seem to help the engine breathe a bit better. I am running it with an Airaid CAI and no tune...yet.

I really like the sound of the exhaust. There's a little drone from 2000-2500 or about 70-75mph. Thinking about adding the Diamond Eye resonator down the road. See how it goes after the exhaust burns in. The directions could be better as to which way the hangers need to go. The extension pipe did need to be cut for the size of the truck, 2014 3.5L crew 6.5' bed.

Extremely nice product! Packaged well, and came undamaged and fast. Had a local muffler shop install for a $100 bill and said he wanted to know the name of it because all the others he's installed were not as easy and most importantly didn't sound as good as this one. I have a edge programmer and a banks cold air intake and the edge programmer does not allow for custom tunes and I think that's what I need. When I really get on it it falls on its face then turns into a rocket ship and back and forth until I back off some. I'm no mechanic but I suspect with all the freedom of air out isn't allowing enough back pressure for the turbos or the air fuel mix is off with the 4' exhaust. If anyone has experience with this and can tell me, please help me? Otherwise a great kit! Especially for the money!!

I bought this setup because it was budget friendly. I like the noise it gives, which in my opinion isnt too loud as others say. Looks good, and fit perfectly. Took literally 30 min to install laying in the garage.

Love the sound of the exhaust. So far the only draw back is that I live In the mountains and the drone gets kinda loud going uphill nothing terrible but long trips can be a little annoying. The radio kinda drowns it out. Other then that I am completely satisfied with my purchase. I would recommend it to anyone with the 5.0 it's worth it!

Gains in mileage, HP and SOUND. Wife HATES it. I Love it. Easy to install.

The 4” exhaust looks great on the truck compared to stock and sounds pretty good for v6 too. It has a deep low tone, and I can hear the turbo whistle now as well. Installation wasn’t too bad. I think It took me longer to get my stock exhaust off than it did to put the new one on. Overall I would recommend this exhaust. The quality and sound seems pretty good for the price.

Glad I went with this exhaust I have no complaints it sounds great not all tuner out. Noticed a huge difference right away increased mpg. Great for the money don't know why you would go with anything else. Install was very easy and simple.

This exhaust is really easy to install and sounds great! Give you that sound you're looking for and at highway speeds you barely hear it. Very little drone in the cab when cruising but when you punch it, it wakes up. Defintely felt a power increase with this and the afe cai I installed with it. Would defiently recommend this exhaust to anyone with an ecoboost.

Doesn't sound bad at all. Install was quick.

Excellent exhaust system. Some people said that one of the exhaust hangers hits the drive shaft if this is the case,it was installed wrong. I installed this kit in an hour taking my time. There is more than enough room between the exhaust hanger and the drive shaft. Thanks Stage 3 for fast shipping and excellent service!

I read a lot of reviews when I started my exhaust search. I watched all of the Stage 3 exhaust video clips. I finally decided on this kit based on the other reviews on here. I opted for the stainless exhaust tip also. Install took about an hour and half. I only needed a 10mm socket, a 14mm socket, a 9/16 socket and a 9/16 wrench. I opted for cutting my OEM exhaust in 2 places; right after the resonator and right after the muffler. I chose to do that for 2 reasons. 1 - I was installing this with the truck on the ground and by myself, and 2 - My OEM clamps were seized with rust. Old exhaust was out in less than 15 mins. Mocked all of the new exhaust pipes into place per the Diamond Eye instructions. Once I was happy with the placement, I started at the flange end and tightened everything down. There is a little bit of drone when you are on the gas but I have read that this will diminish after the initial 200 mile burn in of the muffler. Once again, VERY happy with Stage 3! Ordered this kit on a Sunday night and it arrived Wednesday afternoon.