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Comp Cams Stage 4 Xtreme Energy XE274HR Camshaft (86-95 5.0L)

Item 30148
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      Product Information

      Features, Description, Reviews, Q&A, Specs & Installation


      • Upgrade Over Stock
      • Increased Street Performance
      • Noticeable Idle
      • Hydraulic Roller Lifter
      • For 1986-1995 Mass Air Equipped 5.0L Mustangs


      Street Performance. This Comp Cams Xtreme Energy cam is an excellent upgrade from stock for improved street performance. With increased responsiveness and a step up duration, a greater performance can be felt from a Xtreme Energy Camshaft.

      Noticeable Idle. Give your 5.0 Pony a nice noticeable idle that is louder than stock, but is not overbearing or obnoxious.

      Application. This Comp Cams XE274HR Camshaft is designed for use in Mass Air equipped 1986-1995 5.0L V8 Mustangs with modifications such as better flowing heads, Intake, Fuel System upgrades and steeper 3.55 to 3.73 rear gears for peak performance. Compatible with O.B.D.4.Technical Note. This cam requires a minimum of a 3.55 rear-end gear, automatic transmissions require at least a 2500 RPM stall converter.

      Fitment: 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 Details

      MPN# 35-518-8

      CA Residents: WARNING: Cancer and Reproductive Harm -


      Customer Reviews (4)

      Write a Review

      Ratings Summary

      5.0 out of 5 overall rating from 4 customers

      Installation Time: Full Day

      Installation Cost: $500-$1000

      • November 22, 2017

        5 1994 GT - VidalP Installation Time: Shop Install Installation Cost: $500-$1000


        Cams will go on with edelbrock heads and a 347 stroker kit with a 50 shot of now. Look forward to hearing them bald eagles and all that chompin.

        Helpful (15)
      • November 02, 2017

        5 1990 GT - AnthonyTampaBay Installation Time: Less than 1 Hour

        Installed last weekend

        Installed this last week. there was some very minor rust on one of the lobes but it was wiped off with gloves on my hand with ultra slick engine assembly lube. Cam works great and is running great in the new engine. Install was very easy because the block was already outside of the car.

        Helpful (14)
      • October 05, 2015

        5 1993 GT - FiveoJoe Installation Time: Afternoon

        Very nice camshaft!

        Fantastic idle, not too lumpy or unstable. Sounds excellent. I have a 331 stroker motor with AFR 185cc heads, and 30lbl injectors. It will need a good tune to make it nice. Backing up is of course harder than normal, but not bad. Idle is stable, but it likes to be at 900-1,000 rpms. Take offs are good, not that much different from a stock motor/heads/camshaft. Listen to the fact that it needs at least 3.55 gears. I currently have the 3.08's (will change soon). It will take off with more power than you had, but it's not a huge difference HOWEVER, once you get above 3,000 rpms, that's when it wakes up like an adrenaline shot to the heart. Best use for the weekend warrior, perhaps a little too radical for a daily driver.

        Helpful (20)
      • October 16, 2012

        5 1990 Other - atv087 Installation Time: Weekend

        Excellent. more power out of my 347 with a mild idle.

        Excellent. more power out of my 347 with a mild idle. 347 stroker trick flow twisted wedge heads. put this cam .good idle. not too lumpy.

        Helpful (12)

      Questions & Answers (10 answers)

      5 Top Rated Questions

      Will this work well with a Weiland Stealth intake and carb on a 331 windsor with C4 and 3.25 rear gear?

      What is the lift, duration advertized, duration at .050, and what is the lobe separation angle ?

      will this work with ported GT40X heads, 347 stroker, trickflow upper and lower intake, and 24lbs injectors?

      • These will work with your setup but you will need to check your piston to valve clearance with these.

      Helpful (0)

      will this cam work with GT40X heads, Eldebrock performer RPM intake, 408 stroker, fitech EFI carb, torque storm supercharger

      • While the Comp Cams Stage 4 Xtreme Energy XE274HR Camshaft will work with the setup you described, it is designed for an RPM range that is higher than your intake will support. We would recommend the Stage 3 version of this cam for your setup.

      Helpful (0)

      I have a 88 GT, mass air, 70 mm tb, 30lb injectors, sve intake, sve heads, 347, BBk long tubes. Will this cam match my components with the right springs a tune? Mostly worried the intake won't be good for the higher rpm'

      • The Comp Cams Stage 4 Xtreme Energy XE274HR Camshaft will work well with your setup, though we strongly recommend checking piston to valve clearance. A tune would be required to maintain the speed density setup with this cam. For a more dedicated street car, a stage 3 cam may be a better option, but for a street/strip car this would work well.

      Helpful (0)
      Post Your Question
      5 More Questions
      Any suggestions for base idle setpoint with this cam in a 5.0? I have a 4bank chip on the way. 1 answer
      what is all included with this purchase? also, can i swap this with the stock cam with out upgrading any engine parts? 1 answer
      Will this camshaft work with stock heads with no head/valvetrain work? Also, will it work with stock pistons (valve piston clearance)? 1 answer
      Can I use this for carbureted set up 1 answer
      Can Bama tune the 4 bank eliminator chip for this cam? 1 answer

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (1) Camshaft

      Tech Specs

      Comp Cam Data Sheet
      Part Number: 35-518-8 Grind Number: XE274HR
      Lifter Type: Hydraulic Roller Lifter Engine Type: FORD 5.0 (1982-2001)
      RPM Range: 2200 to 6200 Valve Timing : 0.006
      Lobe-Center Angle 112 Intake Center Line: 108

      Intake Exhaust
      Valve Lash: Hyd. Hyd.
      Duration: 274 282
      Duration @ .050" Lift: 224 232
      Valve Lift: 0.555 0.565
      Lobe Lift: 0.348 0.354

      Valve Timing @ 0.006" Lift: Open Close
      Intake: 29 BTDC 65 ABDC
      Exhaust: 77 BBDC 25 ATDC

      Will It Fit My Mustang

      • GT - 87, 88, 89, 90, 91, 92, 93, 94, 95
      • LX - 87, 88, 89, 90, 91, 92, 93
      • Other - 86

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