Cometic Chrysler HEMI 5.7L 4.000in Bore .040in MLX Head Gasket - Left

I absolutely love it I haven’t had any issues at all I appreciate yall for sending me it and taking care of all my problems

Harold G. 5/5 Verified August 12, 2026

Piece showed up in good condition and was easy to install.

Carson S. 5/5 Verified July 29, 2026

Looks way better than stock studs and last longer.

Jed S. 5/5 Verified July 24, 2026

Fit perfectly in the stock location and is way bigger than stock and shipped fast. Would recommend full send diesel to anyone looking at these type of parts!

Dakota P. 5/5 Verified July 16, 2026

I had a few questions about the install. I called and left a message and then shortly there after my call was returned with the answers I needed. Appreciate the help.

Scott W. 5/5 Verified July 16, 2026

The billet heat exchanger looks great and is machined nicely. No worries about an internal failure allowing fluids to mix. It seems to be doing its job. It's more robust than the factory style cooler but I don’t believe it is quite as efficient based on warm up times I’m seeing. My only gripe is the bracket mounting bolts, they thread directly onto the cooler instead of passing all the way through and securing with nuts. Make sure to use thread locker along with the lock washers. As a rough guide, torque for M8 fasteners in aluminum should be 11-15 ft lbs, no torque spec is listed for the mounting hardware in the instructions.

Charles H. 4/5 Verified July 9, 2026

👍👍

Kyle D. 5/5 Verified July 8, 2026

It’s not bad, I was in a bind and needed a quick fix to get my truck back going. So first things first, the kit works. You can get rid of the steel lines and these will take their place. With about an hour and a half and a little research it doesn’t take much to get these hoses installed. However, I have some gripes about this kit. 1. You have to be very careful about how the lines are run to prevent the hose from kinking. 2. There are no p clamps or hardware included to hold the lines in place. To improve this kit, I’d toss some hose clamps, a couple bolts with some p clamps to hold the hose, maybe a couple pictures on where to run things too, or even total install instructions. Stiffer hose would be good too, in my pictures you can see that the hose going to the front of the engine is trying to kink as it makes the bend to run beside the turbo.

Noah T. 3/5 Verified July 4, 2026

High quality piece!

Johnathan T. 5/5 Verified July 2, 2026

Excellent customer service.. thank you

Willie R. 5/5 Verified June 24, 2026

Love the way it looks will look good for my build only 15 and love buying from fsd great people and quality stuff will look good on my first truck

Preston S. 5/5 June 20, 2026

Fast and professional!

Casey S. 5/5 Verified June 2, 2026

Great quality product. Length is perfect 👌. Recommend FullSend for all your performance upgrades

Brett B. 5/5 Verified May 30, 2026

It came with no gaskets this item deff needs to be sold with cover gasket as well as the seal for the crank even a plug for the vent or a fitting to hook a tube to the vent. Didn’t come with shit but bolts. Now I got to track everything else down seperatly makes it a pain in the ass. At this point I’d rather have stayed stock

Jacob M. 3/5 Verified May 28, 2026

This is an essential upgrade to any Dodge/Ram that’s fighting 68rfe transmission temperature problems. The stock cooler is very insufficient!!

Brock M. 5/5 Verified May 25, 2026

AN line came apart on the hose barb with the clamping nut still tight within 2k miles. Almost nuked a brand new transmission before i could get it to the shoulder.

Brian 1/5 May 25, 2026

send me some stickers nexted time but all good

Levi D. 5/5 Verified May 22, 2026

I installed them when I built my transmission. Hoses are good quality but fittings felt kind of cheap. Not a bad kit at all. I’d recommend it to anyone. Substantial trans temp difference after putting them on. My trans runs a lot cooler now that I’ve bypassed the heat exchanger. 2012 ram 2500 with 68rfe. 9/10 would recommend. Just be gentle with the fittings

Max F. 4/5 Verified May 11, 2026

Awesome upper coolant pipe. Just what I wanted polished to go with my other parts. Great price and fast shipping. Also entries to possibly win a bad ass Cummins.

Drew P. 5/5 Verified May 4, 2026

KINGSPEED parts a well built awesome quality

Paul D. 5/5 Verified May 3, 2026

Great replacement transmission line kit for the 4th gen trucks. Other thing I added was heat sock around the lines running by the turbo and down pipe. Also got another transmission by pass block that has removable line adapters, so you can use the AN adapters.

John B. 5/5 Verified April 18, 2026

Love the fitment of the catch can and haven’t had any issues yet great product

Austin C. 5/5 Verified April 7, 2026

Finally got my valve cover and catch can installed!! I couldnt be happier with the way it looks!

Kyle T. 5/5 March 31, 2026

I installed this cooler and a few weeks later got into a wreck that was able to damn near total my truck, the frame is bent in 4 places and it shifted my ranch and bumper a foot. This cooler was the only radiator that survived everything else was destroyed and wrapped around the cooler. I called customer support and was able to order new stainless steel brackets and this cooler will live again. I’m very impressed with the quality and strength of this part and would gladly buy it for another truck.

Fritz G. 5/5 March 17, 2026

Had a confusion on core for the value body. But once figured out the kit can in a week or less. Pretty easy install. Quality is super high and looks amazing.

Tyson W. 5/5 March 6, 2026

Nice

Mychal N. 4/5 Verified March 6, 2026

Amazing valve cover!!

Taylor P. 5/5 Verified March 5, 2026

Very happy with quality

Jim B. 5/5 Verified February 6, 2026

These fit perfect. 2026 Ram 2500. Easy install didnt have to remove anything. Have a drill and rivet tool is all you need. Would definitely buy again

David Y. 5/5 Verified December 25, 2025

I love their product. I change them every three oil changes on my 2002 dodge 2500 diesel.

Leroy V. 5/5 Verified December 18, 2025

Everything went together good, no problems

Devin E. 5/5 Verified December 12, 2025

Points added a nice touch where some crappy plastic ones previously resided. Great fit

Ken S. 5/5 Verified November 26, 2025

I buy a lot of parts for you guy for my business. Will be buying more soon. Thank guy keep it up👍👍

Joshua B. 5/5 November 20, 2025

I love the product. I am just upset that it wasn’t clear it doesn’t come with any hardware. I currently have no clue what barb fittings and hose sizes I need to get for the valve cover to my catch can. I am currently using a hardware store setup as this is my first Cummins and my first quality build of a truck. If there’s anyway you could assist me or point me in the right direction that would be awesome. Aside from that I’ve had nothing but compliments on it, I actually won top 10 truck and SCT x GFP in Nashville a few weeks back. Everyone including myself love the valve cover.

Caleb H. 3/5 Verified November 7, 2025

.

Caleb L. 5/5 Verified October 8, 2025

Absolutely love it best thing I ever did shift great does amazing

James W. 5/5 Verified October 2, 2025

Shifter works slick!

Samuel R. 5/5 Verified September 4, 2025

FSD always delivers!! 🤘🏻

Joe M. 5/5 Verified August 26, 2025

So Glad I purchased the high output alternator cable along with the high output alternator. Truck runs Great!

Bradley M. 5/5 Verified August 25, 2025

Had this thing for just over a month now. My 7.3 had the small housing alternator from factory so I needed to use the spacers. Using the spacers makes the belt slightly harder to get back on so I would recommend going up 1/2" on the belt size. Otherwise I have no issue, powers the truck just fine for the last 1000 miles.

Gunther B. 4/5 Verified August 12, 2025