Free Shipping On Orders Over $49. Details

Talk to a Mustang Expert
Every day 8:30AM EST - 11:00PM EST
Win 1 of 3 Exhaust Kits! Enter Daily!

SLP 1-5/8 in. Ceramic Long Tube Headers (96-04 GT)

AmericanMuscle no longer carries the SLP 1-5/8 in. Ceramic Long Tube Headers (96-04 GT). Please check out 1999-2004 Mustang Long Tube Headers for an updated selection.
This item currently can not be added to your cart. Please try again later.

Local Install Shops

Quoted installation from $125

View 3 Shops

near 19355 (change)

Sorry, please enter a valid US or CA postal code
We're sorry, zip can't be updated at this time.

Features & Details

  • Rear Wheel Horsepower and Torque Gains
  • Long Tube Header Design
  • Free Flowing Mandrel-Bent Tubing
  • Aluminum Ceramic Coating
  • Made in the USA
  • Fits 1996-2004 GT and 2001 Bullitt
Dyno-proven RWHP Gains. Get the most power out of your GT with a set of SLP Long Tube Headers. These SLP ceramic coated headers will replace your restrictive factory manifolds to improve your mustangs exhaust flow and increase your Pony's horsepower and torque. Increases of up to 15 RWHP have been seen when installed with a matching SLP shorty X-pipe.

Aluminum Ceramic Coating. SLP uses a durable Aluminum Ceramic Coating on its long tube headers to reduce under hood temperatures, increase horsepower, lengthen the headers life, and for it's outstanding good looks. Ceramic Coated headers will long out last both polished and chrome plated headers.

Made In The USA. Hand-crafted right here in the U.S.A from 1-5/8" mandrel bent 409 stainless steel tubing, these SLP Long Tube Mustang Exhaust headers feature venturi-style velocity collectors to optimize exhaust flow, resulting in a monster increase of horsepower.

Recommended Upgrade. To realize the full power potential that these Long Tube Headers have to offer, AmericanMuscle recommends a custom tune with a Mustang Handheld Tuner to reprogram the vehicles computer (ECU) for proper operation.

Application. These SLP Ceramic Long Tube Headers are designed to fit the 1996 to 2004 GT Coupe and 2001 Bullitt Mustangs with manual and automatic transmissions. SLP recommends using their SLP Shorty X-pipe for a perfect fit and the best performance gains possible.

Technical notes. Not legal for use on pollution controlled motor vehicles; intended for off road use only. Convertible models will require modifications to factory K-member cross brace.

CA Residents: Warning: California's Proposition 65

What's in the Box
Hardware included:
  • (1) Passenger Side Long Tube Header
  • (1) Driver Side Long Tube Header
  • (2) Gaskets
  • (16) Header Bolts
  • (2) O2 Sensor Extensions
  • Installation Instructions
Installation Info
Tech Specs
Header Specifications
Header Type: Long Tube Finish : Ceramic Coating
Type Mid Pipe Required: SLP Shorty Fitment: 96-04 GT Manual & Automatic
2001 Bullitt

You Might Also Like

Customer Photos (6) Submit Your Photo

View All 6 Photos

Questions & Answers (7)

5 Top Rated Questions

I have a 2002 mustang gt convertible with a manual transmission it says you have to amoeba modifications to the k member. Is it for installation purposes or for fitment?

  • The SLP 1-5/8 in. Ceramic Long Tube Headers will require modifications to the K Member on convertible models for proper fitment.

Helpful (0)

I own a 2001 GT Convertible with Automatic trans - will these headers fit my car? Also, would there be any mods required to the k-member to fit these headers to the car?

  • These SLP Ceramic Long Tube Headers will fit with you 2001 GT Automatic when used with the SLP Ceramic Long Tube Headers, item 23014. Since your Mustang is a convertible, it will require some modifications to your factory k-member cross brace for proper fitment.

Helpful (0)

Will this long tubes fit on a 03 04 Mach 1?

  • No, these headers will only fit the GT models

Helpful (0)

Will these fit bbk x pipes? I just recently purchased and installed the bbk o/r x-pipes with slp lm2 catback exhaust in 00 gt. Would I have to purchase new x-pipes

  • We strongly recommend using SLP's shorty mid-pipe with their SLP Ceramic Long Tube Headers. Using different manufactures for headers and a mid-pipe, could result is slightly skewed fitment due to manufacturing tolerances.

Helpful (0)

Does American Muscle sell a Off Road mid pipe for a 2001 mustang gt automatic transmission? I currently have Shorty headers on my 2001 mustang and I want to upgrade to Long tube Headers. I seen that the only Long tube Headers in stock that would fit my auto trans is the SLP long tubes. I do not mind buying any kind of Long tube headers as long as it fits my auto trans, but My problem is i don't want a catted mid pipe and i want a off road mid pipe, but The SLP long tubes only come with catted mid pipe. Can american muscle help me in my problem. I want Long tube headers with a O/R mid pipe and i don't see any O/R mid pipes i can choose from. The only long tubes i can choose for auto trans is the slp long tubes but that comes with catted mid. is there a way i can get a O/R mid pipe with any brand long tube headers for my auto.

  • We also offer the PaceSetter Long Tube Headers that would fit your 2001 GT automatic. The shorty mid-pipe we offer to mate with these LTs is an off-road shorty. I've included the links for both below! Hope this helps!

Helpful (0)
Post Your Question
2 More Questions
1998 cobra i have a 1998 cobra will this fit? 1 answer
Will these headers fit my 01 stang auto trans and do yall sell a O/r mid pipe that will fit these headers. I got a 2001 mustang gt automatic transmission and i was wondering if american muscle sells a Off road mid pipe that goes with the SLP long tube headers. I see in the drop down button it offers the catted mid pipe but i wanted a O/R mid pipe for automatic transmission. 1 answer

Customer Reviews (16) Write a Review

Overall Rating 4.8

out of 5 stars

Installation Time:Full Day

Installation Cost:$500-$1000

  • Performance Gain 4.428571 4.4
  • Fit 4.142857 4.1

  • 5/5

    Installation Time: Full Day

    April 15, 2017

    Absolutely LOVING this purchase! CAN'T go wrong!

    When it comes to headers you can see from other reviews on other brands you get what you pay for, these Cermaic Coated SLP Longtubes sound AMAZING, give the car an aggressive rubble in conjunction with the Catted X-Pipe from SLP. Packaging was great, fitment was great, couldn't be happier with them!


    Year: 2004 Submodel: GT

    Helpful (5)

  • 5/5

    Installation Time: Full Day

    March 21, 2017

    Love em

    I'm pretty please with these SLP long tube headers. They woke up the stang immediately. My baby is growling now and on the e way she's in beast mode.


    Year: 1999 Submodel: GT

    Helpful (6)

  • 4/5

    Installation Time: Afternoon

    February 12, 2014

    Good Sound Change

    SLP is known for their drastic sound changes and for making good power. From the sounds of it they've achieved that here and for the feel of it i do have some more high-end pull. Install was as fun as any long tube is, but doable with the right tools and time.


    Year: 1996 Submodel: GT Malvern, PA

    Helpful (5)

  • 5/5

    Installation Time: Less than 1 Hour

    January 05, 2014

    Excellent fit

    Thanks again am for being the best mustang site ever prices and delivery love it ,I put these headers on with my motor on engine stand so it was very easy I dropped my motor in my 98 mustang gt with the headers and my new t56 trans all installed together and was very easy also these slp have plenty of ground clearance these r a most have thanks am


    Year: 1998 Submodel: GT

    Helpful (6)

  • 5/5

    Installation Time: Full Day

    February 12, 2013

    slp headers

    Very nice sound whit this headers. Just on the installation of the left side you need to bend the egr tube to fit the fitting on the headers and for tranny work you will need to remove the right side headers for clearance so i recommend this headers


    Year: 2001 Submodel: Bullitt Padoue, QC G0J, Canada

    Helpful (5)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $500-$1000

    April 30, 2012


    Had these installed past week on my 96 gt other than some drone while in fifth these sound great they get my two thumbs up


    Year: 1996 Submodel: GT Point Pleasant, WV, USA

    Helpful (5)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $500-$1000

    April 29, 2012

    another great product from SLP

    The long tube headers are great they look good sound good and one of only a few items i have installed that I could really feel a difference from! Coupled with the catted X pipe, and loudmouth exhaust makes for a real race car sound under full throttle. I was very pleased overall. The shop had fitment issues, however I am not sure that the headers were to blame.


    Year: 2000 Submodel: GT Lorain, OH

    Helpful (7)

  • 3/5

    June 19, 2011


    I didn't want to mess around with the install myself, I knew what a chore this can be. I happily paid to get these installed. Still battling exhaust leaks between the header and cat. Was told the emblem on the header collector inhibited a perfect seal for the band clamp. Haven't had a chance to look at it myself yet. Slip fit exhaust is typically a pain.


    Year: 2002 Submodel: GT

    Helpful (8)

  • 5/5

    November 15, 2010

    Love em

    I have an 03 auto and they still fit even though it says manuals, and unlike the MAC headers that I had to send back they did not hit the transmission pan, not really louder but they have a deeper tone

    Chris James

    Year: 2003

    Helpful (18)

  • 4/5

    August 23, 2010

    Awesome Product

    I have been running these for 4 years now and they show very little sign of corrosion. Big power gain on my 98 GT mated with a SLP cat back and o/r x pipe. Only bad thing is this becomes the lowest point on the car. Very well made.


    Year: 1998 Submodel: GT

    Helpful (10)

  • 5/5

    April 03, 2010

    bitch to install but worth it

    first off get your friends together with an engine crane and a lift then slap these headers on. Install is a nightmare but once you get everything out of the way it goes pretty smooth and the finished product is well worth it tons of power and lots of noise.... perfect


    Helpful (10)

  • 5/5

    August 27, 2009

    SLP all the way

    Wanna talk about a difference!? these long tube headers along with the SLP x-pipe really deepened the sound of my car. Sounds so aggresive now. Well worth the money!!

    Mike Harper

    Helpful (7)

  • 5/5

    March 12, 2009

    Great Product

    Awesome performance and sound. With my tune in you can definitely feel a big difference. Worth the money invested in them.


    Helpful (6)

  • 5/5

    June 10, 2008

    Great Sound

    Great sound and performance. I would recommend intake and cams to really get the most from these headers.

    Chris D

    Helpful (6)

  • 5/5

    November 17, 2007

    Worth It

    Sounds great, definitely felt a pick up in power. Good fit.

    Robert S.

    Helpful (6)

  • 5/5

    October 10, 2007

    Fantastic fit, Great PI

    Increase in power is fantastic. Fit was good.

    Bryan Whipple

    Helpful (6)

Related Mustang Categories