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MAC 1-5/8 in. Ceramic Unequal Length Shorty Headers for GT-40P Heads (79-93 5.0L)

Market Price $403.60 You Save 13% ($52.65)
Our Price

$350.95 (pair)

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  • Item 100517
  • MPN# 50158

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Features & Details

  • Increases Horsepower and Torque
  • Shorty Unequal Length Header Design
  • Free Flowing 1-5/8" Mandrel-Bent Tubing
  • 16 Gauge Steel Construction
  • Polished Ceramic Finish
  • CARB EO Number: D-241-4
  • Fits 1979-1993 5.0L V8 Mustangs with "GT-40P" Heads
More Horsepower And Torque. Replace those restrictive stock manifolds with a set of MAC Shorty Headers to improve your mustangs exhaust flow and increase your Pony's horsepower and torque.

Unequal Length Design. These MAC Performance Headers feature a shorty, unequal length design that in addition to making more power also cleans up your engine bay for a show-winning look.

Ceramic Coating. These Headers are completed in MAC's Polished Ceramic Coating that not only looks great, but reduce under hood temperatures to help increase horsepower and extend the life of the headers. Ceramic Coated headers will long out last both chrome plated and polished headers.

High Quality Construction. Constructed from 1-5/8" mandrel bent 16 gauge steel tubing so there are no kinks to rob you of power, these MAC Performance Headers feature 2-1/2" True Fit Collectors that eliminate the need for gaskets which are prone to leak and blow out. These headers are then completed in a polished ceramic finish for good looks and a durable long life.

CARB Certified. Best of all these MAC Mustang Headers are 50-state smog legal under Carb EO# D-241-4.

Application. These MAC Shorty Unequal Length Headers are designed to fit the 1986-1993 5.0L V8 Mustangs with production and new angled spark plug 5.0L GT-40 “P” cylinder heads. Will also fit 1979 to 1985 V8 Mustang and other Fox chassis vehicles with modifications.

Fitment: 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 Details

What's in the Box
  • (1) Driver side header
  • (1) Passenger side header
  • (2) Gaskets
  • (16) Header Bolts
  • (4) Threaded Bolts and Nuts
  • Bracket and Hardware
Installation Info
Tech Specs
Header Specifications
Header Type: Short Tube Finish : Ceramic Coating
Type Mid Pipe Required: Standard Fitment: 1979-1993 5.0 V8 Mustangs with GT-40P Heads
Will it fit my Mustang?
  • Foxbody - 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93
  • Cobra - 93

Fits 5.0L V8's Only. 1979 to 1985 V8 Mustang will require modifications for installation

Most Helpful Reviews

5/5
GT 40P headers

The Headers have a nice finish and seem to be welded and manufactured Well.The only thing one Header bolt was missing, looked like package may have been opened before.

Helpful (1)

5/5
very satisfied customer

I purchased the gt40p swap headers which fit great and gave me more performance and also looks a lot better than the stock headers underneath the hood for the money you can't go wrong excellent item would ...

Read More
Helpful (1)

Overall Rating 4 out of 5 stars
Read All 6 Reviews

Customer Photos (2) Submit Your Photo

View All 2 Photos

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2 Questions / 1 Answers

Ask a Question

what spark plug wires are recommended to use with these headers?

bobbyc

  • Those headers are compatible with any of the spark plug wires we have on the site, no specific one needs to be used with those headers.

    AMjordan

Helpful (0)

What would be the best spark plug wires to use with these to ensure good clearance?

PaulC

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Customer Reviews (6) Write a Review

Overall Rating 4.0

out of 5 stars

Installation Time:Full Day

Installation Cost:$100-$250

  • Performance Gain 4.666667 4.7
  • Fit 4.833333 4.8



  • 5/5

    Installation Time: Afternoon

    June 09, 2016

    GT 40P headers

    The Headers have a nice finish and seem to be welded and manufactured Well.The only thing one Header bolt was missing, looked like package may have been opened before.

    Flipper

    Year: 1992 Submodel: GT

    Helpful (1)

  • 5/5

    Installation Time: Afternoon

    December 10, 2015

    very satisfied customer

    I purchased the gt40p swap headers which fit great and gave me more performance and also looks a lot better than the stock headers underneath the hood for the money you can't go wrong excellent item would recommend for anybody with gt40p heads easy to install

    nick

    Year: 1994 Submodel: GT Ruther glen va

    Helpful (1)

  • 5/5

    Installation Time: Afternoon

    January 24, 2014

    My Unequal Length Shorty Headers

    My new headers were easy to installed. They look great on the engine. Plenty of space around them. And they sound great with my dumps.

    Lugardo

    Year: 1991 Submodel: GT Fort Lauderdale, FL, USA

    Helpful (1)

  • 4/5

    Installation Time: Afternoon

    October 07, 2017

    Cheaper than replacing plug wires constantly

    They bolted right up, no issues and no more burnt plug wires on my GT40P heads, the mating surface wasn’t the best but I installed them anyway and don’t have any leaks. They cleared my driver side steering easily. They look phenomenal, and cleaned up my engine bay well. I love that it comes with gaskets and new bolts. I would recommend these to anyone who’s running GT40p heads.

    Dylan

    Year: 1989 Submodel: LX

    Helpful (0)

  • 1/5

    Installation Time: Shop Install

    Installation Cost: $100-$250

    September 21, 2017

    TOTAL HEADACHE.................DON'T FIT

    These headers DO NOT fit GT40P heads. Plain and simple. don't waste your money only to get SO frustrated with these things that you want to destroy them with a sledge hammer. There is no way you can get plug wires on these things and you have to install the plugs FIRST to get the headers on. They might fit GT40 heads, but, NOT the P heads.

    WilliamF

    Year: 1993 Submodel: LX

    Helpful (0)

  • 4/5

    August 15, 2017

    93 Mustang mac headers

    Fits perfect on my 93 foxbody Mustang gt , nice look under the hood very happy with these headers.

    bobbyc

    Year: 1993 Submodel: GT

    Helpful (0)

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