(approx) a Day
Mechanical expertise or professional installation required.
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Hey, guys. Today we're taking a look at the Comp Cams Stage 4 Xtreme Energy Camshafts for the '96 to '04 GT Mustang. These are gonna be a good option for those of you out there that have already modded your 4.6-liter and that are looking for camshafts to tie together your mods, get the most out of your naturally aspirated build and obtain the coveted lopey idle. These cams are designed to be used with upgraded valve springs and they work best with upgrades like an intake manifold, full exhaust, and of course, a tune. Comp Cams also recommends 355 or 373 rear gears with these cams and a 2,000 plus stall converter for auto cars. They cost about $600 and the install will be a full three out of three wrenches in the difficulty meter.Before we get into any of the specifics here, I will say that if you're planning a forced induction or a nitrous build, Comp Cams does make cams specifically for those builds. If your GT isn't heavily modified yet Comp also makes cams that will be better for your building than these ones. These are Stage 4 cams, which means that they are pretty aggressive when it comes to specs. Gonna want to make sure that you're picking the correct cams for your build and that you have the right supporting mods to pair with these. A lot of technical things come into play when you're looking at cams and specs. So, if you add these without the correct supporting mods, you're gonna end up with a car that doesn't run right that can be difficult to drive on the street and that doesn't make the power that it should.Breaking these cams down some, Comp calls them their hot streak cam and says that you can expect a great mid-range power and torque increases from these cams. They have an RPM range of 2,000 to 6,000 once again for those naturally aspirated builds. Like I mentioned earlier, due to the nature of these cams, Comp specifically calls out needing a 355 or 373 or steeper rear gear and a 2,000 plus stall converter if you have an auto car. Of course, custom tuning and valve springs will be required too. And valve spring retainers will be needed due to the increased pressure that the valve springs are gonna create.Just for a reference, if you want to compare the Stage 4 cams to the Stage 5 cams, the Stage 4 cams leave you with a little bit more room and some more choices. The Stage 5 cams require a 373 rear gear or steeper and they function best from 2,200 to 6,200. So, you get some more top end RPM with the Stage 5 cams, but you do lose some of the low RPM power band which can have an effect on the streetability. You're also looking at having to go with that 373 or steeper rear gear and a higher stall converter too. Hopefully, that's helpful to those of you out there that are trying to decide between the Stage 4 and the Stage 5 cams. They are different and you want to make sure that you understand what the cams will need in order to perform well and where they're gonna give you your performance before picking up a set.Looking at the specs, you want to consider specs like the lift and duration of the camshaft since that'll tell you how your valves will be opening and closing. Comp tells us that the specs for these cams are as follows: a duration of 274 and 278, a valve lift of 0.5, lobe lift of 0.274 and a lobe separation of 114 degrees. So, you have a bigger lift than the stock cams, which allow more air into the cylinders and more duration too which means more power. And because you are changing so much with your lift and duration, Comp does say that you'll need to upgrade to their Beehive valve springs in order to support the added lift. It's not a good idea to skip upgrading your springs and retainers too since they do go hand-in-hand. If you don't upgrade the springs and retainers you run the risk of doing the cam upgrade and then having issues with your valve springs down the road, and worst-case, dropping a valve and losing your engine. You also have to always consider piston to valve clearance when you're shopping for cams, so the correct valve springs and a new set of retainers are always a good idea to upgrade to avoid issues there. As far as horsepower numbers go, those are always going to be hard to nail down. You have to consider the difference in build, fuel, and tunes. These are things that are gonna create different power numbers for different people, so it's really hard to say. The other thing that comes into play here with these cams besides power gains is that wonderful sound. Everyone loves that big lopey idle and these cams certainly deliver that. Comp Cams calls out a rough idle as one of the features here, so you won't be disappointed there. Once again, I'll call the install a full three out of three wrenches in the difficulty meter. You will need some knowledge to complete the install yourself or you could always take the car to a shop. If you guys are interested in checking these cams out more for yourself you can always do so right here at americanmuscle.com.
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Features, Description, Reviews, Q&A, Specs & Installation
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
CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
January 14, 2019
Stage 4 comp cams
Very well packaged and good low end gains. I’m boosted and i don’t know if these were made for boost lol buttt she holdsHelpful (6)
December 16, 2018
Great rumble, loves high RPMs
These were the first 'major' upgrade I made to my mustang. It mostly just had easy bolt-on upgrades from the previous owner. The rumble is exactly what I wanted, the shiftknob shakes in my hand and you can see the car shake at idle. Now it turns heads because is obnoxiously red and sounds obnoxiously fast. This was my first time tearing into an engine by myself, but not my first time doing heavy work on a vehicle. The ford modular is pretty forgiving, at no point did I feel like I was in over my head. Highly recommend this cam.Helpful (6)
June 13, 2018
Best sounding cams out there looking for that rumble and mean old school sound then these are the setsHelpful (6)
April 11, 2018
What was described in the item is exactly what I got. My customer is very happy. We will be ordering again for all high performance.Helpful (7)
June 22, 2017
I got the great sound that I wanted from the cams.Helpful (8)
June 22, 2017
Purchased these for my 2000, 5.4 f150. Tough idle, excellent power, and very noticable torque. Launches hard, even with a 3.31 stock gear setup.Helpful (15)
October 07, 2013
The lope and roughness of these cams is ridiculous. I love the sound and have no drivability issues. Daily drive the car with no problems. Picked up an extra 30 or so horses also. The power curve starts a little earlier and lasts through 6200. It pull waaay harder than ever before. Thanks American muscle for another great product!Helpful (24)
October 07, 2013
Great product. Awesome power gains from 2200 to 6000. Pulls amazing.Helpful (18)
I have a 2002 Ford Mustang gt Would a stage cam 3 or 4 be a better fit.Im looking for the aggressive sound and still be able to drive around every now and then.
Cam selection will rely heavily on modifications already done to your vehicle, as well as it's intended uses. We do not typically recommend the Comp Cams Stage 4 Xtreme Energy XE274H Camshafts unless you have a cold air intake, larger throttle body and intake plenum, long tube headers, and a full exhaust. This cam will build power in the 2000RPM-4000RPM range, so it can be used on the street, however power under 2000RPM will suffer. The Comp Cams Stage 3 Xtreme Energy XE270AH Camshafts may be a better bet for a street car with their 1800RPM-5800RPM range.
What do i need for these stage 4?
The Comp Cams Stage 4 Xtreme Energy XE274H Camshafts are designed for heavily modified vehicles, and work best when installed on cars that have long tubes, off road exhaust, cold air intake, throttle body and intake manifold all replaced. We recommend replacing the springs and retainers with these cams.
do you need to change the valve springs?
Valve springs do need to be changed. It is recommended to use COMP Cams® 26113 valve springs for proper fitment.
Can i use the same timing chains and marks?
I just got a set of the stage 4 cams with springs and retainers, is there any need to replace the lash adjusters and rockers or can I reuse the stock ones?
You do not have to replace them for this install, you can use thestock rockers and adjusters.
Due to the aggressive nature of the Comp Cams Stage 4 Xtreme Energy XE274H Camshafts we recommend not driving the car until it has been tuned, once these are installed.
Yes, the correct Comp Cams valve springs are required for install and proper function.
Piston notching is not required, however due to production tolerances in the OEM heads and pistons, we do recommend verifying piston to valve clearance.
This is for the cams only. At this time we do not offer any cam gears.
The Comp Cams Stage 4 Xtreme Energy XE274H Camshafts will work well with your setup, especially at the track, and wide open throttle.
These cams will work for your Mustang. However, you would require steeper gears than the factory ones, if you have not upgraded those yet. Other than that and the new upgraded comp cams valve springs required for this upgrade, this would fit perfectly!
The Comp Cams Stage 4 Xtreme Energy XE274H Camshafts can be used with superchargers, however they will not be ideal, and instead a dedicated blower cam should be used.
(approx) a Day
Mechanical expertise or professional installation required.
What's in the Box
|Part Number:||102300||Grind Number:||XE274H|
|Lifter Type:||None - OHC||Engine Type:||FORD 4.6 and 5.4 SOHC MODULAR 2-V (1992-Present)|
|RPM Range:||2000 to 6000||Valve Timing :||0.05|
|Lobe-Center Angle||114||Intake Center Line:||110|
|Duration @ .050" Lift:||236||240|
|Valve Timing @ 0.05" Lift:||Open||Close|
|Intake:||7 BTDC||48 ABDC|
|Exhaust:||57 BBDC||2 ATDC|
Fits 1996-2004 4.6L Two Valve Mustangs Only