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PaceSetter Black Long Tube Headers - Manual (01-04 V6)

10 Reviews
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  • Item #51056
  • MPN# 70-3221

  • Market Price $233.44
  • You Save 13% ($30.45)
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  • Increases Horsepower and Torque
  • Long Tube Header Design
  • 16-Gauge Carbon Steel Constructon
  • Free Flowing Mandrel-Bent Tubing
  • Black Painted Finish
  • Manual Transmission Only
  • Fits 2001-2004 V6 Mustangs
More Horsepower And Torque. Now you can improve the performance of your V6 Mustang with a set of PaceSetter Black Long Tube headers for power you can feel throughout the RPM band. These Long Tube headers when combined with a PaceSetter shorty mid pipe will greatly improve your Mustangs exhaust flow for an increase in horsepower, torque and throttle response.

Durable Construction. Manufactured from 1-5/8" mandrel bent 16-gauge carbon steel tubing for strength and unrestricted airflow, these PaceSetter Long Tube Mustang Exhaust headers feature CNC-machined 3/8" thick header flanges for additional strength and an OEM fit.

Black Painted Finish. These PaceSetter Headers feature a standard black painted finish, which is used to protect the headers during storage and shipment, as well as providing an aggressive appearance to your engine bay. This is not a heat-resistant coating.

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

Application. These PaceSetter Long Tube Headers are designed to fit manual transmission 2001 to 2004 Mustangs equipped with either 3.8L or 3.9L V6 engine. These Long Tube headers will require the use of a shorty style PaceSetter X-pipe for proper installation (See drop down option above).

Technical Note. This PaceSetter product is not legal for use in emission restrictive states.

Fitment: 2001 2002 2003 2004 Details

What's in the Box
  • (1) Driver side header
  • (1) Passenger side header
  • (1) gasket kit
Installation Info
Tech Specs
Header Specifications
Header Type: Long Tube Tube Finish : Black
Type Mid Pipe Required: Shorty X-pipe Fitment: 2001-2004 V6 Mustangs
Will it fit my Mustang?
  • V6 - 01, 02, 03, 04

Not compatible with automatic transmissions

Most Helpful Reviews


you should really get these if you are looking for a nice loud exotic but muscle sound

Helpful (1)

Really let down by Pacesetters

First of all - I wana start off by saying that I love I've been a customer for several years & have always been satisfied with every transaction. With that said - I'm kinda disappointed ...

Read More
Helpful (13)

Overall Rating 3.9 out of 5 stars
Read All 10 Reviews

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6 Questions / 7 Answers

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I have a 1999 V6 and would like to know if these pace setter long tube headers will fit? I really want to get them but want to ensure fitment. its a 99 v6


  • Unfortunately, these will not fit properly on your 1999 V6 as they are made specifically for 2001-2004 V6 Mustangs.


    Good Answer (0) (0)

Question Resolved

Approximate price to install? Could someone post the price it took to install on your car? Or how much it should cost?


  • The install is similar to the long tube headers I installed on my 85 GT. I had it quoted from an exhaust shop at $1200. I did it myself in about 6-8 hours. I did a combination of lifting the engine and dropping (loosening the K member on one side and unbolting the other to make the clearance and switching.) It is difficult but not completely unreasonable. I'd rather spend a vacation day or than spend $1200. I imagine on a newer car the clearances are even more restricted so it maybe more money and longer time.


    Good Answer (0) (0)

Answer This Question I need this answered (0) (0)

X Pipe / H pipe? If I do get these, do I need an X pipe or an H pipe to install? Or will they just install into my stock Y pipe?


  • These Long Tubes Headers would require the Pacesetter Shorty X-pipe for proper fitment. They will not fit in combination with your factory Y-pipe.


    Good Answer (0) (0)

Show 1 more answer Question Resolved

How much horsepower would this add to my mustang?


  • For me, I already had a CAI, true dual setup, larger TB, and a race tune, even with all those mods done, I would say this easily put me up another 20-25, the air flow is unreal and when you floor it you can feel the ripping, its nice!


    Good Answer (1) (0)

Answer This Question I need this answered (0) (0)

I know this says 01 to 04, but I have a manual 2000 v6, will these fit? Im about to buy them but want to make sure.


  • The PaceSetter Black Long Tube Headers - Manual (01-04 V6) will not fit on a 2000 V6 because the differences between the Windsor and Romeo motors. Valve covers and Cams will be different sizes which means that the PaceSetter Black Long Tube Headers will not match up to the heads of a 2000 V6.


    Good Answer (0) (0)

Question Resolved

Will this fit with dual exhaust conversion? Mac dual exhaust and how will it sound with the pacesetters after installation? And if it won't fit are there any other headers you would recommend with the Mac dual exhaust?


  • We would recommend using the same manufacturer for the header and mid-pipe due to differences in manufacturers tolerances. Using two different brands may result in improper fitment. PacerSetter requires that their headers only be used with the mid-pipe, as other mid-pipes will not be a direct fit.


    Good Answer (0) (0)

Question Resolved

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Customer Reviews (10) Write a Review

Overall Rating 3.9

out of 5 stars

Installation Time:Weekend

  • Performance Gain 4.125 4.1
  • Fit 2.5 2.5

  • 5/5

    August 06, 2016


    you should really get these if you are looking for a nice loud exotic but muscle sound


    Year: 2002 Submodel: V6

    Helpful (1) (0)

  • 2/5

    Installation Time: Full Day

    December 08, 2011

    Really let down by Pacesetters

    First of all - I wana start off by saying that I love I've been a customer for several years & have always been satisfied with every transaction. With that said - I'm kinda disappointed to see AM selling these headers. The install is a nightmare! Driver's side went in pretty smoothly. Passenger side just doesn't seem like it was designed to fit with the stock k-member at all. I tried almost everything outside of pulling the motor... it. just. wont. fit. =( So I go ahead & fire it up anyways with a shorty on the right & a longtube on the left (just for kicks. lol). In less then 2 minutes, the black powdercoating started to crack/burn/peel right off. Looks like absolute garbage now. Long story short - I am very disappointed. I wish I had just spent the extra $ & picked up a set of MAC LT's instead. I hear they have little to no fitment issues.


    Year: 2003 Submodel: V6 Newport Beach, CA

    Helpful (13) (8)

  • 5/5

    Installation Time: Weekend

    September 20, 2013

    Best Headers!!

    I am very happy to purchase these pacesetter long tube headers. The installation was not bad, it just takes time. These headers are the best mod for a v6 mustang because they add a good amount of horsepower and torque. I am also pleased because these long tube headers make people look at you and also get compliments daily because they are loud and have a nice muscle car deep tone. Overall I am very pleased to buy these headers from American muscle because they are a bang for your buck and also gained a good amount of performance at a fantastic price.


    Year: 2001 Submodel: V6 Charlotte, NC, USA

    Helpful (5) (3)

  • 1/5

    Installation Time: Weekend

    January 24, 2014

    Pacesetter Long Tube Headers

    Bought these headers a while back, and before, the fit description said it will fit on 01 -04 mustangs 3.8L and 3.9L with automatic transmission took the car to various shops and none could get them to fit i gave up and the headers are just gathering dust in a shed and now they've changed the description to Manual transmission only. No wonder I could never get them to fit. If I new they only fit on Manual transmissions I would have never bought them. I bought from from this website because it seemed reliable and trustworthy compared to all the others. But now I'm beginning to doubt American Muscle's website.


    Year: 2004 Submodel: V6 Eagle Pass,Tx

    Helpful (1) (0)

  • 5/5

    Installation Time: Shop Install

    January 04, 2012

    From v6 to...BEAST!

    Although these are my first set of aftermarket headers ever, with shop installation kinda high due to fitting, and low hanging clearance...these Pacesetter's are worth every penny! Topping off my CAI, TB, SCT 4 bank, and off road duals with Flowmasters...not only do i feel the hp gains during mid to high end launch...i definitely HEAR it too!"THROATY".."PUNCHY".."NUTS" how a few people describe my 04 now...THANKS AMERICAN MUSCLE!


    Year: 2004 Submodel: V6 Honolulu, HI

    Helpful (3) (3)

  • 5/5

    Installation Time: Full Day

    January 26, 2014

    Long tube headers v6

    I like them it gives you a way better sound a lot of people think my car is a v8 now the only thing that kinda sucked was that the right side I think really didn't fit at first so I cad to take parts of the engine and higher up the mount


    Year: 2002 Submodel: V6 Weslaco, TX, USA

    Helpful (1) (2)

  • 4/5

    Installation Time: Weekend

    August 06, 2013

    Great product

    Fitment was a little difficult to fit. Took a while, but once on the car felt great. Loud and strong


    Year: 2003 Submodel: V6

    Helpful (1) (3)

  • 5/5

    Installation Time: Full Day

    May 09, 2012


    These long tube headers are awesome! They have amazing airflow and make your car sound like a beast. The only problem I had is the install. The passenger side you can't just fit the headers from the top or up from underneath your car. You have to move your transmission to the left by unbolting it. Causes a little stress and problems but once you do that it's a breeze. But overall amazing product.


    Year: 2001 Submodel: V6 Colorado

    Helpful (2) (4)

  • 3/5

    Installation Time: Full Day

    November 08, 2012

    looking for something cheap this is it

    Product was hard to install but for performance I give it a fair review it not and not the.worst it's make sound better


    Year: 2001 Submodel: V6 Fort Worth, TX, USA

    Helpful (0) (5)

  • 4/5

    September 15, 2016

    PaceSetter Long Tubes

    Product fits well, it also sounds good and gives you that power increase! i ran some Magnaflow along with these LT's. It really gave me some power back that i had lost.


    Year: 2001 Submodel: V6

    Helpful (0) (0)

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