Review & Install Video
Hey everybody. I'm Justin with AmericanMuscle.com, and this is my detailed review of the Kooks Off-Road Long Tube Headers 1-7/8 inch in diameter available for your 2015 and up Mustang GT. Top quality materials here, guys, 304-grade stainless steel, impeccable welds, all made in the USA. There's really not a lot to nitpick there. This particular long tube is of the off-road variety meaning it's not going to have any cats which is typically going to deliver the biggest power in sound gains. They do include the cat-less portion of the downpipe or the factory connect here and what that means is this is going to hook up to your factory cat-back exhaust system or even your aftermarket exhaust system as long as it hooks up like a factory style.
Now in browsing long tubes here at AM, you are going to stumble across a few different options and, honestly, they are all quality. Kooks. Stainless Works, American Racing, you're really not going to be making a bad choice no matter what you go with. Pricing wise, they're going to all fall somewhere between the $1000 to $2000 range, and the Kooks are going to land smack dab in the middle of that. Now let's face it guys, long tubes, they're not exactly a small investment but the results are worth it. Expect anywhere from 15 to 25-wheel horsepower depending on your tune in addition to that awesome change in your exhaust tone.
Now, this is a 1-7/8-inch header here guys, and I think you're going to find this is the most commonly offered size for the long tube headers for your S550 Coyote-powered GT. I should point out, however, that Kooks does offer a slightly smaller runner in the 1-3/4-inch version of this header and we can discuss the differences in sizes till we're blue in the face, but here's what I'm going to tell you. Take my recommendation and go with the 1-7/8-inch header here. It's going to be just fine for your naturally aspirated light bolt on application. But if and when the urge comes for more power, and believe me, it oftentimes does whether it's through boost or otherwise, you're going to have plenty of header to grow into.
All right guys, so let's pick this thing up. I'll actually walk you through it a little bit and show you what you're going to be working with here with the Kooks long tube. Let's start, first off, three-inch merge collector, but what you can't see is the scavenger spike that's located inside of this. It's Kooks' patented system. They claim it's going to help increase exhaust scavenging improving your exhaust flow in the process and improving your performance. Now one big thing I really like to point out here with the Kooks long tube is that all the primaries here one piece, mandrel bent from basically the flange all the way down to the collector. Now that's really huge because a lot of times on lesser brands, lesser quality headers, they'll use a bunch of small pieces of runner welded together to make these bends, but they can often crack because welds are sub-par. Not the case here with the Kooks. As you might expect, all the welds are completely beautiful and they even go as far as smoothing them out here on the flange side at the head just to help reduce any exhaust turbulence.
Another thing that gets a big thumbs up for me, guys, is what Kooks includes in the package. We're looking at top of the line cosmetic exhaust gaskets, stage eight locking header bolts, and factory style O2 extensions. Again, stuff that you might not expect, but it is nice to see when you're forking out top dollar for a set of headers. As for the install, well again, guys, not going to sugar coat this one. It's a full three out of three wrenches on my difficulty meter. We called it a full day here on the site and that sounds about accurate. It might even stretch into two days if you want to leave yourself a weekend, probably the safe bet. You can do it on a jack stand but, believe me, doing it on a lift is going to make life a whole lot easier. And at the end of the day, if all this sounds like a big no thank you, spend the money, have them installed by your local shop. You can thank me later.
I really have nothing negative to say about the Kooks long tube headers in the off-road variety. The quality is completely top-notch. Materials, welds, everything is completely on point. Guys, if you want to read up on some more customer reviews, feel free to do so here on the site. I'm Justin, thanks for watching. And for all things Mustang, keep it here at AmericanMuscle.com.
More Horsepower and Torque.
A set of Kooks Long Tube Off-Road Headers will greatly improve the performance of your 2015-2017 GT Mustang. Kooks Headers feature an integrated venturi style collector that increases exhaust scavenging and reduces turbulence. As a result, it will improve your S550's exhaust flow over the restrictive stock manifolds, boosting your Pony's horsepower and torque numbers.
Kooks Long Tube Exhaust Headers are manufactured from 1-7/8" mandrel bent 304 stainless steel tubing that merges into 3" collectors with scavenger spikes for superior airflow. These headers feature a leak-free ball and socket design for optimal performance and a better than OEM fit.
To realize the full power potential that these Long Tube Off-Road Headers have to offer, AmericanMuscle recommends a Bama custom tune with a Mustang Handheld Tuner
to reprogram the vehicles computer (ECU) for proper operation.
These Kooks 1-7/8 in Long Tube Off-Road Headers are specifically designed to fit the 2015-2017 5.0L GT Mustangs and is a direct bolt on to the stock exhaust system.
Not legal for use on pollution controlled motor vehicles; intended for off road use only.These Headers are intended for left hand drive applications only.
CA Residents: Warning: California's Proposition 65
- What's in the Box
- (2) Long Tube Headers
- (1) Connection Pipe Assembly
- (2) Gaskets
- (2) Clamps
- (16) Small Bolts
- (8) Flat Washers
- (4) Long Bolts
- (4) Nuts
- (1) O2 Connector
- Installation Info
Installation Time: (approx) a Day
Difficulty Level:Mechanical expertise or professional installation required.
- Tech Specs
||Type Mid Pipe Required:
||304 Stainless Steel
||"No" - For off-road use only
||2015-2017 GT Mustangs|
- Will it fit my Mustang?
These Headers are intended for left hand drive applications only.