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Accufab Upper Intake Plenum (96-04 GT)

AmericanMuscle no longer carries the Accufab Upper Intake Plenum (96-04 GT). Please check out Ford Mustang Intake Manifolds, Plenums & Gaskets for an updated selection.
Market Price $239.99 You Save 4% ($10.00)

$229.99

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  • Item 15002
  • MPN# 4.6PLENUM

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AmericanMuscle no longer carries the Accufab Upper Intake Plenum (96-04 GT). Please check out Ford Mustang Intake Manifolds, Plenums & Gaskets for an updated selection.

Features & Details

  • Increases of 10 RWHP and 15 RWTQ
  • Improves airflow for more power
  • Perfect For Larger Throttle Bodies
  • Durable aluminum construction
  • Fits 1996-2004 4.6L GT Mustangs
Better Air Flow for More Power. This Accufab Upper Intake Plenum increases the stock airflow from 460 CFM to an impressive 620 CFM to produce a dyno proven 10 more horsepower and 15 FT/Lbs of torque on a stock Mustang, making this Intake Plenum the perfect mod for any 4.6L GT Mustang.

A Must For Larger Throttle Bodies. Installing a larger aftermarket throttle body on the stock intake plenum still restricts incoming airflow, but now you get the most out of your Mustangs bigger throttle body by installing a Accufab intake plenum for improved air flow.

Premium Quality. Accufab's intake plenum is precision CNC machined from high quality cast aluminum and is polished to a brilliant, mirror-quality finish. This Accufab Upper Intake Plenum is built to last.

Application. The Accufab Upper Intake Plenum is a direct bolt-on replacement for all 1996 to 2004 4.6L 2V GT Mustangs using a Stock, 70mm, or 75mm Throttle Body.

Fitment: 1996 1997 1998 1999 2000 2001 2002 2003 2004 Details

What's in the Box
Hardware included:
  • Throttle Body Gasket
  • IAC Gasket
  • EGR Gasket
  • Plenum Tubes
  • TPS mounting screws
  • IAC mounting screws
Installation Info
Will it fit my Mustang?
  • GT - 96, 97, 98, 99, 00, 01, 02, 03, 04

Does not fit 2001 Bullitt

Most Helpful Reviews

5/5
It\'s worth it!

Added this Plenum with a 75mm tb and cai, among other items and could definately tell a huge difference compared to stock. Well worth it and looks sharp under the hood as well.

Helpful (7)

5/5
Great!

I bought this Monday and it came Wednesday morning. I installed this plus a 70mm professional throttle body in less than 45 minutes easily, and I can significantly feel the power gain! Go with it!

Helpful (12)

Overall Rating 4.8 out of 5 stars
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Customer Reviews (20) Write a Review

Overall Rating 4.8

out of 5 stars

Installation Time:Afternoon

Installation Cost:$100-$250

  • Performance Gain 4.444445 4.4
  • Fit 5 5



  • 5/5

    March 16, 2009

    It\'s worth it!

    Added this Plenum with a 75mm tb and cai, among other items and could definately tell a huge difference compared to stock. Well worth it and looks sharp under the hood as well.

    Justin Bradford

    Helpful (7) (2)

  • 5/5

    November 12, 2008

    Great!

    I bought this Monday and it came Wednesday morning. I installed this plus a 70mm professional throttle body in less than 45 minutes easily, and I can significantly feel the power gain! Go with it!

    jeff

    Helpful (12) (1)

  • 5/5

    March 30, 2010

    Accufab Plenum

    Looks awesome all chrome. more throttle response with putting this on along with a spacer. would reccomend going with a 75 mm throttle body as well

    Drew

    Helpful (8) (0)

  • 5/5

    February 06, 2011

    Looks Great! Worth The money!

    Revived this item with the Stack Racing TB and Spacer. Not bad to install biggest problem was getting the screws off the old Plenum.Overall Great product. Looks great and I felt a HUGE Difference. Thanks AM

    Griffin

    Helpful (5) (0)

  • 5/5

    Installation Time: Less than 1 Hour

    December 05, 2012

    THIS PRODUCT IS A MUST FOR THE 4.6 2V

    I JUST RECEIVED AND INSTALLED THE ACCUFAB UPPER INTAKE PLENUM. I HAD ALREADY PUCHASED THE 70 MM THROTTLE BODY. THESE TWO PARTS FIT PERFECTLY AND IT ONLY TOOK A LITTLE OVER AN HOUR TO INSTALL. I DID NOTICE DECENT POWER GAINS AT ALL RPM'S. THE ACCUFAB THROTTLE BODY AND PLENUM ARE A MUST FOR YOUR 4.6 2V. THANK YOU AGAIN AMERICAN MUSCLE FOR GREAT SERVICE.

    1JUSTRHTGT

    Monrovia, CA, USA

    Helpful (2) (0)

  • 5/5

    Installation Time: Afternoon

    November 19, 2012

    Excellent Item !!!!!!!!!!!

    Install one afternoon then on the next day had it Dyno ant PRO DYNO and the horsepower was 254 and torque was 300 Excellent !!!!!!!!!

    cryates1

    Mayberry NC

    Helpful (1) (0)

  • 5/5

    October 14, 2010

    Accufab Plenum 4.6L

    I liked it gave more air flow, easy to instll jus basic tool, looks good under the hood u can actually feel and hear the power.

    Denis Estrada

    Helpful (1) (0)

  • 5/5

    October 14, 2010

    Accufab plenum

    very satisfied with this product.paired with the 70 mm throttle body i definately noticed a differnece instantly.installation was very simple and i never work on cars

    corey l

    Helpful (1) (0)

  • 5/5

    February 15, 2011

    Great Plenum

    I purchased this plenum and 75mm TB a few years ago and I haven't looked back yet. Throttle lag disappeared, throttle response increased and the look that it has always get compliments at shows. I would buy it again if I had to, but this thing is solid. This is a one time purchase. It'll be on my car forever.

    Shawn O'Neill

    Helpful (2) (2)

  • 5/5

    Installation Time: Less than 1 Hour

    July 04, 2014

    Better than stock

    I could tell a difference as soon as I went on a test drive

    Camerokiller04

    Southboston va

    Helpful (0) (1)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $100-$250

    June 30, 2014

    Accufab Upper Intake Plenum

    noticed a big improvement coupled to C.A.I. and 70mm. throttle body.

    harley92

    Cornwall, ON, Canada

    Helpful (0) (0)

  • 5/5

    Installation Time: Less than 1 Hour

    June 11, 2014

    Working out

    Added this and a 70mm throttle body as preparation for a nitrous installation seems to be a little more meat on the bone. It fattened up the upper mid range power This 2002 SOHC is in a 2200 lb FFR roadster.

    65cobra

    Helpful (0) (0)

  • 5/5

    Installation Time: Less than 1 Hour

    March 20, 2014

    Great Upgrade

    Installed the Accufab plenum along with a 75mm TB and a new bama tune at the same time. Greatly improved throttle response and acceleration especially over 3000 rpm. Installation is quick and easily done in an hour. Hardest part was the tps screw heads stripped out and had to drill the heads off...might want to pick up an ez-out beforehand to be safe. Very satisfied with this combination.

    JasonS69

    Reno, NV

    Helpful (0) (0)

  • 2/5

    Installation Time: Afternoon

    July 01, 2013

    Bogs below 3k rpm

    Almost exactly the same as the SR intake plenum I bought, but I thought I'd give this one a chance. Fits better and looks nicer than the SR unit, but also loses power/torque below 3000 rpm compared to the stock unit. All Bama tune revisions I tried seem to have the same result as well. Bottom line, if it adds 15 lb-ft of torque as stated, it's at high rpm's only.

    redriderjf87

    Iowa, USA

    Helpful (0) (0)

  • 5/5

    Installation Time: Afternoon

    June 21, 2013

    Good Upgrade

    The accufab plenum from AM was the one I finally decided to go with, and I'm glad I did. Even though you really don't need in structions, I wished they came with it. However it was a pretty easy install. I took the neg. battery post off before I started and I can't notice any idling issues yet. I have notice that she runs like a beast now. I only did the plenum with the stock tb, why give it more air than it can handle anyway. Overall it was a very good mod for my mustang. Thanks.

    TruBlu02

    St. Louis, Mo.

    Helpful (0) (0)

  • 5/5

    Installation Time: Less than 1 Hour

    March 24, 2013

    looks sharp and sounds great!!!

    I installed this great plenum in about an hour combined it with the 70mm edelbrock throttlebody.GREAT COMBINATION. I GOT BETTER THROTTLE RESPONSE.LOOKS EXCELLENT UNDER THE HOOD.I ENJOY LISTENING TO MY PONY INHALE MORE FRESH AIR.VERY HAPPY WITH HAVING ACCUFAB AND EDELBROCK WORKING TOGETHER ON MY SET UP.

    demonikpony98

    El Paso, TX, USA

    Helpful (0) (0)

  • 5/5

    January 24, 2011

    Awesome

    I purchased this upgrade with other mods and this seems to be great for performance. It was a very easy and quick install. I don't hear it whistle like some say or gasp for air, but I don't know if its because I got the 70mm tb either. Would highly reccommend!

    James

    Helpful (0) (0)

  • 5/5

    January 04, 2011

    upper plenum

    awesome product. went on easy, looks great, and gained a few horses

    jason

    Helpful (0) (0)

  • 5/5

    November 13, 2010

    Great product

    Just bought the accufab plenum and spacer, noticed a huge improvement over stock plenum. Works a lot better with a tuner. Awesome upgrade you wont be disappointed. 97 GT

    J.C

    Helpful (0) (0)

  • 5/5

    October 04, 2007

    Great performance

    I purchased this 75 mm upper plenum and it fit perfect, looks awesome and performs even better.

    Evan

    Helpful (0) (0)

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