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Accufab 90mm Race Throttle Body w/ Spacer (86-93 5.0L)

9 Reviews
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  • Item #15012
  • MPN #F90K
  • Market Price $319.99
  • You Save 13% ($40.00)
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  • Fits 86-93 5.0L Mustangs.
  • 90mm diameter at blade.
  • 4" inlet diameter.
  • CNC cut solid billet aluminum construction.
  • Highly polished finish.
  • Includes 2" blank spacer & gaskets.
  • Improved throttle response.

Maximum Flow. This race-ready 90mm throttle body delivers maximum flow to your monster 5.0L Mustang. With its CNC machined billet aluminum construction and split-shaft design, this top of the line 90mm throttle body kit from Accufab delivers maximum performance and reliability to put you ahead of the pack. Included is a 2" blank solid aluminum spacer with no water passages or tubes, which provides options for mounting your stock cable bracket.

Exceptional Quality. Accufab's 90mm race throttle body is made to the highest standards. Manufactured using CNC machining, this piece is made from billet aluminum combined with a stainless steel split shaft to ensure this throttle body will hold up under intense pressures.

Forced Induction and Built Motors. This track ready throttle body will support your built or forced induction 5.0 engine. Note that a dyno tune will be required after installation of this throttle body due to the amount of sheer amount of air provided to your engine.

Feel the Power. An aggressively sized 90mm race throttle body will deliver the air your heavily modified engine needs to maximize both existing and future modifications. With this kit, you'll bolt on more ponies in minutes and increase your throttle response for a quicker jump off the line and out of the corners. For the Mustang enthusiast who is building a track or drag monster and doesn't want to compromise on performance, this throttle body is a necessary addition to your arsenal.


  • 90mm throttle body
  • 2" blank spacer
  • Stainless steel split-shaft design
  • CNC Polished billet aluminum construction

Tech Notes:

  • For forced induction or built engines only.
  • For track use only.
  • Pre-calibrated at Accufab, please do not adjust screws on the throttle body.
  • Requires use of 4" tubing and hose clamps.
  • Requires dyno tune.

NOTE: If you are looking for a street-legal option, or for less modified Mustang, consider Accufab's 70mm or 75mm kit with EGR spacer.

Mustang Fitment: 1986 1987 1988 1989 1990 1991 1992 1993 Details

What's in the Box
  • (1) Throttle Body
  • (1) Spacer
  • (3) Gaskets
Installation Info

Installation Time: (approx) 1 Hour

Difficulty Level:Advanced mechanical skills required.

Tech Specs
Throttle Body Specifications
Bore Size: 90mm Single or Twin Blade: Single
Year: 1986-1993 Model: 5.0L
Material: Aluminum Finish: Polished Aluminum
Manufacturer: Accufab Computer Tune Required: Yes

  • Foxbody - 86, 87, 88, 89, 90, 91, 92, 93

Fits 5.0L V8's Only

Most Helpful Reviews View All

Overall Rating 5/5 Write a Review
Accufab is the Best!

Switch from the Accufab 75MM Race TB to the 90MM Race TB and picked up 7 RWHP and 4 RWTQ... My little 347 now puts down 406 RWHP and 386 RWTQ on 91 octane at the pump... Thanks Accufab!!!

Helpful (6) (0)

Great Value

Perfect for my F2 procharger set-up.. Great price and it even included the 2 spacer that i needed.

Helpful (3) (1)

Customer Photos (3) View All

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Reviews (9) Write a Review

  • 5 Stars 1.0 100%
  • 4 Stars 0 0%
  • 3 Stars 0 0%
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  • 1 Stars 0 0%

out of 5 stars

9 Customers Recommend this Product

Installation Time:Less than 1 Hour

  • Performance Gain: 4.5 4.5/5
  • Fit: 5 5/5
  • Bang For Your Buck: 4.333333 4.3/5
Filter By Sort By
  • 5/5

    Accufab is the Best!

    February 11, 2010

    Switch from the Accufab 75MM Race TB to the 90MM Race TB and picked up 7 RWHP and 4 RWTQ... My little 347 now puts down 406 RWHP and 386 RWTQ on 91 octane at the pump... Thanks Accufab!!!


    Helpful (6) (0)

  • 5/5

    Great Value

    April 27, 2010

    Perfect for my F2 procharger set-up.. Great price and it even included the 2 spacer that i needed.

    Ken Greenwood

    Helpful (3) (1)

  • 5/5


    March 04, 2011

    Skill level 1, car show beauty,I have a 76mm Turbo and they are a match in heaven! Love it! AAAA+++++++

    Gilbert Otero

    Year: 1989 Model: GT Driving Style: Street / Strip

    Helpful (1) (1)

  • 5/5

    Go big or go home!

    October 21, 2014

    Excellent quality, Fit and finish is perfect, Best throttle body I've used, Highly recommend.


    Year: 1989 Model: GT Driving Style: Race 'Stangs I have owned: 10+ Salem, OR, USA

    Helpful (0) (0)

  • 5/5

    Accufab 90mm Throttle Body

    May 28, 2014

    Great Product At A Great Price, its huge 4" inlet and it narrows down to 90mm (3.5") at the blade , simply best of the best.... make sure you have enough engine for this baby ...


    Year: 1988 Model: GT Driving Style: Street / Strip 'Stangs I have owned: 2 Middle Village, Queens, NY, USA

    Helpful (0) (0)

  • 5/5

    Accufab 90mm throttle body

    February 23, 2014

    This product was exactly wht I needed for my Turbo fox body fits and works great def recommend for boosted cars plus fast shipping


    Year: 1989 Model: GT Driving Style: Street / Strip 'Stangs I have owned: 5+ Denver, CO, USA

    Helpful (0) (0)

  • 5/5

    Well built, excellent performance, great looking throttle body.

    July 24, 2013

    My first reaction opening the box was a stunned "whoa". Pictures don't do the polish job on these throttle bodies justice. It is literally a mirror finish. Along with that, the throttle body is very robust and well built, and installs perfectly. Install time for any throttle body on these cars is a quick ordeal, but I had a few extra things to do, like find a new routing for the vent line off the valve cover, since this particular throttle body does not have provisions for one. Because of that, I rated it as an afternoon project, rather than "less than 1 hour", like most throttle bodies would be. Other goofy things to keep in mind is that, because the bore is so big, the idle air control motor mounting screws will have to be shortened, so they don't protrude into the air path. I also gave "bang for your buck" a 4 instead of a 5, simply because it does not come with a throttle position sensor. Ignoring that, it's tough to beat the price American Muscle sells these for. Most people are already going to have a TPS, anyway. Finally, performance gain is going to be based on what your current combo is, and what parts are acting as bottlenecks. Obviously, a stock 5.0 with the anemic stock intake isn't going to benefit from a 90mm throttle body. However, my current intake is designed for a 90mm throttle body and my ultimate build goals make a 90mm unit a good idea. Because of that, I gave it a 5 star, but individual results may vary.


    Year: 1986 Model: GT Driving Style: Street / Strip 'Stangs I have owned: 1 Indianapolis, IN, USA

    Helpful (0) (0)

  • 5/5

    great throttle body

    December 24, 2012

    I think accufab makes some of the best throttle bodys.


    Year: 1988 Model: Other Driving Style: Race 'Stangs I have owned: 1 Topeka KS

    Helpful (0) (0)

  • 5/5

    Accufab 90mm TB

    February 07, 2012

    The name speaks for itself. You are not going to find a better quality, nicer looking throttle body than accufab. Only thing that could make it better is if it came with the tps sensor.


    Year: 1986 Model: GT Driving Style: Street / Strip 'Stangs I have owned: 1

    Helpful (0) (0)

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