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Comp Cams Stage 5 Xtreme Energy XE278AH Camshafts (96-04 GT)

Market Price $666.99 You Save 12% ($77.00)
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$589.99 (pair)

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  • Item 30160
  • MPN# 102700

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    Features & Details

    • Street and Strip
    • More Horsepower and Torque
    • Rough Idle
    • Custom Tuning Required
    • For 1996-2004 GT and Bullitt Mustangs
    Street and Strip. If you're looking to get even more power out of your SOHC 4.6L without stepping up to a forced induction set up, then consider a set of Comp Cams XE278AH Camshafts. They will give you great mid to high range power gains in both horsepower and torque making them ideal for street and strip.

    Rough Idle. If you love the sound of a rough idle, you won't be disappointed by this cam. Like the muscle cars of yesteryear, this cam yields a sound that will make lesser cars clear a path out of your way at lights.

    Adjustable Cam Gears. Maximize the power from your new camshafts with a set of Adjustable Cam Gears, which will allow you the ability to fine tune your camshaft timing - a critical necessity when doing mods that can change your camshaft-to-crankshaft centerline position. Please see drop down option above.

    Application. This SOHC Camshaft is designed for 1996-2004 4.6L two valve V8 Mustangs with 3.73 or steeper rear gears and a 2400 plus stall speed converter on automatic transmissions. Intake, exhaust, custom tuning and valve spring upgrades are required.

    Technical Note: Comp Cams are designed for modified cars that include upgraded valve springs for clearance related issues. It is recommended to use COMP Cams® 26113 Valve Springs for proper fitment, see drop down option above. Combine the valve springs with a new set of valve spring steel retainers to handle the higher pressures developed by the springs.

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

    What's in the Box
    • (2) Camshafts
    Installation Info
    Tech Specs
    Comp Cam Data Sheet
    Part Number: 102700 Grind Number: XE278AH
    Lifter Type: None - OHC Engine Type: FORD 4.6 and 5.4 SOHC MODULAR 2-V (1992-Present)
    RPM Range: 2200 to 6200 Valve Timing : 0.05
    Lobe-Center Angle 113 Intake Center Line: 109

      Intake Exhaust
    Valve Lash: Hyd. Hyd.
    Duration: 278 282
    Duration @ .050" Lift: 242 246
    Valve Lift: 0.55 0.55
    Lobe Lift: 0.3 0.3

    Valve Timing @ 0.05" Lift: Open Close
    Intake: 12 BTDC 50 ABDC
    Exhaust: 60 BBDC 6 ATDC
    Will it fit my Mustang?

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    19 Questions / 19 Answers

    Ask a Question

    What all modifications to the engine will these cams require? Will they go directly in a stock 99 GT without having to change the heads and so on


    • These cams will fit a 99 GT motor. We would recommend the following maintenance items be changed when you have have the timing cover off. New timing chains, chain guides, as well as a crank sprocket. Also be sure to check you hydraulic chain tensioners and lifters to ensure they are in good function order. Another worthwhile part to consider changing to ensure the motor's reliability for years to come is the Ford Performance SVT 4V Modular Rocker Arm/Follower Set item #50318. Of course the normally recommended upgrades such as cam gears, valve springs, and valve spring retainers are a required upgrade for larger lift cams. All of the aforementioned modifications will need to be professionally installed, and the cam's will need to be professionally timed/degreed to ensure there is no PTV clearance issues. I would however like to guide you maybe in a different direction for cam selection. Reason for that is that a Stage 5 cam on a stock 1999 GT will not be the best cam to go with unless the vehicle is heavily modified. If the engine is stock with little to no bolt on modifications, I would suggest a Stage 2 cam (also offered by Comp Cams) item #30158. If too large of a cam is used, it will surpass the performance capabilities of the motor which will result in poor "off the line" performance and result in poor drivability.


    Helpful (2)

    nitrous Can this cam work with nitrous?


    • Yes they do work with nitrous while being able to be street driven. But if you are looking for max performance and no street driving get a nitrous only cam.


    Helpful (2)

    Hi I have a 2002 roush stage 2 mustang with a stock bottom end and vortech V2 and running about 13 pounds of boost with 42 # injectors and double fuel pumps. What cams would you recommend to sound amazing and perform well with my setup? I’m running 373 gears with 5 speed.. thanks


    • The Comp Cams Stage 5 Xtreme Energy XE278AH Camshafts would not be a good option for your setup, due to the supercharger. We would recommend a blower cam, with the profile designed specifically for the needs of a supercharged engine.

      Rob D

    Helpful (1)

    Why are you steering others away from these cams for the street? We all want 9 second street cars. What makes the stage 5 cams so unstreetable, in your opinion? Lack of vacuum? And you keep dancing around clearance issues. Straight up, can I expect clearance issues if i just throw these in my stock 2002 engine with the correct springs, etc?


    • The Comp Cams Stage 5 Xtreme Energy XE278AH Camshafts is designed for a higher RPM range, with power starting around 2600 RPM, making street driving difficult, especially with automatic transmission Mustangs. Additionally, this cam will produce less vacuum than OEM cams, and will require significant modifications from the engine to make optimum power, such as an aftermarket intake manifold, and long tube headers. Due to production tolerances, some cars may experience piston to valve clearance with these cams. As with any camshaft installation, piston to valve clearance should be measured.


    Helpful (0)

    How much lift and how much duration do these have?


    • These cams have an intake and exhaust lift of 0.55. These would also have a 278 intake duration and a 282 exhaust duration. More information about these cams can be found in the "Tech Specs" section of the page.


    Helpful (0)

    Will this cam fit in stock pi heads?


    • These camshafts will work with stock PI Heads,


    Helpful (0)

    Customer Reviews (5) Write a Review

    Overall Rating 5

    out of 5 stars

    Installation Time:Full Day

    Installation Cost:$500-$1000

    • Performance Gain 5 5
    • Fit 5 5

    • 5/5

      September 29, 2017


      Awesome cam! Installed in my 03 f150 Sounds great! Shreads the streets. It calls for a minimum of 3.73 which is what i went with because it's my daily driver with 2400 stall. Definate increase in horse power and torque. Once again. Sounds great!


      Year: 2003 Submodel: Other

      Helpful (2)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: $500-$1000

      July 19, 2017


      I love the sound these cams have given my car. I have yet to push it but I'm sure it'll be amazing.


      Year: 2003 Submodel: GT

      Helpful (2)

    • 5/5

      Installation Time: Weekend

      April 02, 2017

      Deep rough idle

      Installed this cams on my 1997 Gt engine went threw a fully rebuilt with pi heads heads from an 2003 mustang gt used with all recommended parts for this cam set with a set of headers pipes catback and x pipe my stang sounds good and feels good to get it up so 6k rpms great mod highly recommended tune is a must


      Year: 1997 Submodel: GT

      Helpful (7)

    • 5/5

      Installation Time: Afternoon

      March 29, 2017

      just installed. tech note

      install very easy but be warned a few years I believe 02-04 they switched to a smaller main cam bolt you will need larger one's for comp cam.


      Year: 2002 Submodel: GT

      Helpful (4)

    • 5/5

      Installation Time: Afternoon

      March 20, 2016

      Real power

      If your looking for real power and a good sound then this is your camshaft. I thought I had to do a lot of upgrade to run it nope but I do suggest if you have full Bolton's or are going full Bolton's I highly recommend this cam .


      Year: 2000 Submodel: GT

      Helpful (12)

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