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Head Bolt Kit For 2004-2014 Chevrolet Gen III/IV LS

SKU XP981
Original price $106.37 - Original price $106.37
Original price
$106.37
$106.37 - $106.37
Current price $106.37
Availability:
in stock, ready to be shipped

Please note - primary head bolts must all have the same length. There is a Mid-Year split on the head bolts, if you have 2 different size head bolts this kit is NOT for YOU. 

DO NOT PURCHASE until you have verified the primary head bolt length. 

Please note, when installing our product, the final torque for the 11mm bolts are 80 ft-lbs and NOT 85 ft-lbs as incorrectly noted on our manual

ULTRA STRENGTH

In comparison to standard bolts, our alloy's material characteristics enable much higher tensile strength. For the best fatigue strength, threads are rolled after thermal treatment. A high-quality coating can improve corrosion resistance, reduce friction, and improve overall performance.

EASY INSTALLATION
Installation manual is included with drawn diagrams to ease the installation process. Our head bolts are designed to retain cylinder seal even with today's extremely high-pressure turbo systems. 
PREMIUM QUALITY
Black oxide finish protects from wear and tear. Hardened parallel washers allow for uniform load distribution and accurate torque readings.

Package Contents

30x Head Bolts (M11 x 113.7 mm, M8 x 57 mm) 

30x Hardened Parallel Washers (Part # W0703 W0202)

2x Sockets (10 mm and 13 mm) 

1 x Fastener Assembly Lubricant 

Install Guide
⚠️ Prop 65 WARNING

CALIFORNIA WARNING: Cancer and Reproductive Harm -www.P65Warnings.ca.gov.

Customer Reviews

Based on 18 reviews
94%
(17)
6%
(1)
0%
(0)
0%
(0)
0%
(0)
T
Thomas Hughes (Jeffersonville, US)
LS2

Very high quality and are on par to th ARP bolts I looking at.

C
Courtnie Rech (Chittenango, US)
Head studs

Great product , great quality, fast shipping!

S
Steve Green
Bolt kit

All bolts was in the kit.

F
Franz S.
Worked on LM7

Worked great for LM7 build. I’d recommend chasing out all your threads to ensure you get accurate torque readings. Had one of my threads gunked up and gave me a bit of trouble but after cleaning it out the install went just fine. I torqued them to the 80 ft/lbs stated in the instructions and never felt like I was about to break or strip a bolt. All in all solid purchase.

M
Michael White (St Louis, US)
Great product

Excellent product fast shipping

  • 30-day-hassle-free returns-truck

    Free domestic Shipping

    On all orders. Overnight shipping option available at checkout.

  • Lifetime-Warranty-shield

    lifetime warranty

    If any of our products fail due to a manufacturing defect, we will replace them free of charge.

  • Perfect-fit-guaranteed

    perfect fit, guaranteed

    If the product doesn’t match your engine, we will replace it with no extra charge.

Based on 1211 reviews
89%
(1081)
8%
(99)
2%
(28)
0%
(2)
0%
(1)
Stand pipes/dummy plugs

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

Cold side pipe

Installed pipe and throttle response is much better!

Look OEM+

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.

Very satisfied

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

Good for higher rev reliability

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

Worth every penny

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.

Good quality set

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.

Hard to Beat

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

High quality kit that installs with confidence

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!

Very well package looks really good. Shipping was fast really like them.

I am Really Impressed with the Quality & Construction of the Xotic Performance LS Rockers

‎ Wow! I have been using Xotic Performance Parts for Several Years now with no issues whatsoever, I ordered the LS2 Rockers with the Pre-Installed Trunnions & Installed them in our 5.7L Engine. I am really impressed with the Quality & Construction of the Xotic Performance LS Rockers, Xotic Performance has updated their Trunnions to use C-Clip Retainers that no doubt will increase the service life of the Rocker Assemblies. I gave the Xotic Performance LS Rockers a Full Five Star Rating Across the Board

5.3 rocker arms.

You need upgraded trunions if you want to run a cam with more lift than stock engines. It's a lot easier to install these rockers than convert old ones. These seem to be great quality hardware and work well. They are a fair value for a set of upgraded trunion rocker arms. I approve and would recommend. Same basically asMichigan.

Upgraded seals is a good thing !

The parts have not been installed yet but everything looks up to speed as far as upgrades are concerned.

Great rockers for an LQ4 engine

I am rebuilding an LQ4, and had not planned on new rockers, but ran across this set and thought why not. I was only going to do a valve job and replace the springs and pushrods, but this is a very good quality upgrade. These are very well made and you can tell these are quality parts. These are very easy to install, since I already have the head off and was doing the valves and springs. This is a solid design that will function well on my LQ4. I think this is a very good value for the price and I am glad I found it before I finished the job.

Excellent

This is an excellent set of rocker arms kit. Includes all bolts in a package. High quality and solid parts at a good price. No issues at all. Very nice indeed.

Part was as described and looks to be high quailty

I installed the intercooler pipe as soon as it came in, fit was perfect and it was easy to install.

Precision Upgrade—Smooth Valvetrain Performance

Swapping to the Xotic Performance LS1 rocker arms on my 5.3L engine was one of the best bolt-on upgrades I’ve done. The pre-installed trunion kit and quality hardware meant the install took less than an hour per head, and the arms slid right onto the studs without any clearance issues. Once torqued to spec, the valvetrain feels noticeably firmer—no more lifter tick at idle and valve lash stays rock-solid even at high RPM. I’ve put several hundred miles and a few spirited pulls on the dyno, and oil flow remains steady with zero noise or deflection. If you’re running a stock or mildly built LS2/LS6/LQ4/LQ9/LM7/etc., these rockers deliver reliable, precision performance without breaking the bank.

Don’t know yet , in process of building engine, I’ll know more tomorrow , gave 3 stars because haven’t put torque to yet , the price is great

Strong studs at a great price

These are slightly different than ARP studs but just as strong and saves you money. Installed these on my 09 6.7 Dodge Diesel with no issues 👍🏽

Saved my motor

After trying to install competitors inferior product. I turned to exotic to save my motor from a total rebuild. Awesome product.

Xotic Performance LS1 Rocker Arms with pre-installed trunion kit

These fit perfectly, come with all necessary bolts, and save time with the trunnions already installed. Built strong for performance and reliability and a great value for anyone doing an LS build or upgrade.

The design is much better than original

This is a much better design and has worked flawlessly so far. I’ve put 4 sets of stand pipes on my truck since 2014 and each only lasted 6 months to a year I’m 3 years in on these with no problems. I buy them regularly as a 6.0 mechanic