I bought these think all high strength bolts are the same! They worked good until I put a slightly bigger turbo on and made more boost. Now I have a $50 dollar head gasket to replace because I saved some money instead of buying tried and true ARP. Very unfortunate! Don’t go cheap on performance parts! Plus I reached out to them and got NO response! Only reason I didn’t leave a 1 star is because they are cheap and probably better than factory bolts.

Studs were packaged well and even came with a thread chase. Seems to be just as high quality as other big name brands. Would definitely recommend

Fit and finish are great. So far they seem to be on par with another popular brand out there.

The XOTIC 6.0L stand pipe kit resolved my high pressure oil leak issue. The truck now starts right up and it resumed the normal, i.e. short, crank time. It is still a little early to know how the O-rings will hold up, so only time will tell. Though it is a subtle change, I do agree XOTIC's redesign of the upper pipe tip is an improvement over the OEM Ford/Motorcraft stand pipes. The redesigned tip does seem like it will help reduce the high pressure oil's tendency to be forced towards the O-ring. i.e. The OEM pipe taper does seem to direct the high pressure to the O-ring, which is obviously undesirable. The photos (included) depict my OEM FORD standpipe O-ring failure after only 9K miles. These pipes were installed during a fuel injector replacement project. The original OEM standpipes had lasted (without failure) for 193K miles. There is obviously a FORD "replacement part" supplier issue; and this is further confirmed by the experiences of other 6.0L owners on the various diesel forums. The XOTIC stand pipe kit price is very reasonable and the product is beautifully machined and packaged.

Worked out good no issues at all especially with my added compound turbo studs do there job well worth the price

Parts all came nicely packaged with proper instructions. Came with the correct tap to clean out the threads in the head and the 12 point sockets for the studs. Everything went together good and worked as it should and am very impressed with the product. This is the second set I have installed with no issues.

Better packaging, faster shipping directly from manufacturer. And 1/2 the price of arp. Just wish they’d make connecting rod bolts. Regardless I’m happy with the quality and the extra steps taken to make sure threads aren’t damaged.

Better packaging, faster shipping directly from manufacturer. And 2/3 the price of arp. Just wish they’d make connecting rod bolts. Regardless I’m happy with the quality and the extra steps taken to make sure threads aren’t damaged.

These are just as good for your builds as ARP fasteners , they are everything that they were discribed to be and then some

First things first they offered me $20 to write this review in the form of a refund for my purchase Thought that was important to point out !This is my second set. I have installed on two different trucks. Overall very happy but time will tell if it deserves five stars so far so good 6BT 12 Valve Cummins

Very pleased with packaging and presentation when they arrived shipping is quick comes with everything you need and they are high quality I will be purchasing from Xotic again

Looks great hadn't installed yet for next engine build want the reliability of not having blown stand pipe seals will update when installed looks promising

Is what I ordered And came super fast which was nice

Better than stock

Shipped in one day only payed 8 dollars for shipping. 300 miles later still working and a fixed high pressure oil leak.

Installed pipe and throttle response is much better!

Assembly looks like quality parts. They are very well made and have a smooth, professional look. I am installing these on a spare engine I will be putting together in the next few months.

This was a great kit came with everything you needed to do the job I ran into a small issue because mine was a late 97 12v my main bolts were 12mm instead of 14mm I got ahold of them and they got me the right ones sent over asap great customer service

These actually perform quite good. I'm surprised how easily they torque down but no issues as of yet

Nice upgraded direct replacement rocker arm set. I believe these still have needle roller bearings but as you can see in the pictures they are better protected. I installed them in an LS chevy tahoe with a stage 2 cam and LS7 lifters. They worked flawlessly. I was blown away by the quality for the price, I wasn't expecting them to be this nice.

This seems to be a very well made set. Measuring them with a caliper they are exactly the same ratio as the stock units and seem pretty beefy. The trunions are smooth and look exactly like the more expensive "kits" on the market and honestly probably all come from the same place. I will be running these on a high lift cam at fairly high rpms so I will see how they hold up. I think this is a very good budget upgrade over stock.

If im remembering correctly iv gotten headstuds from this brand before and those were really nice. This kit was just the same high quality rockers and unlike another kit i had where i had to put it all together these were drop in ready. Its not alot of frustration to put the kits together but to know that someone else whos done 1000s of these vs myself thats done a set. quality checked them. it does make me alittle less nervous besides if it breaks wasnt my fault haha. Really easy install everything was there and they work great.

M12 x 1.75" Cleaning & Restoration Thread Chaser Tool

This kit is very well put together and feels solid right out of the box. The rocker arms and trunnions are cleanly machined and the pre-assembly makes installation simple. Everything fit without issues and the upgrade adds peace of mind over stock parts. For the price it is a durable and reliable option that should hold up well in performance builds, making it a good value for anyone working with an LS platform.

High quality and very competitive price vs doing the trunion bushing upgrade alone. Comes with new hardware too so win win!