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🔧 Upgrade your LS engine with rock-solid reliability and precision fit—don’t settle for less!
This 90-piece Cylinder Gasket Head Stud Bolts Nuts Kit is engineered for 97-03 Chevy LS1, LQ9, LS6, and GM trucks, featuring heat-treated iron studs with 220K psi tensile strength and a corrosion-resistant black oxide finish. Designed for easy installation and maximum engine performance, it includes all necessary studs, washers, and nuts for a direct replacement that enhances durability and reliability.
| ASIN | B0824Q1GM6 |
| ASIN | B0824Q1GM6 |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #27,544 in Automotive ( See Top 100 in Automotive ) #4 in Car Engine Head Bolt Sets |
| Color | Black |
| Compatible groove diameter | 11 Millimeters |
| Country of origin | China |
| Customer Reviews | 4.1 4.1 out of 5 stars (428) |
| Customer reviews | 4.1 4.1 out of 5 stars (428) |
| Cutting Diameter | 8 Millimeters |
| Date First Available | 28 November 2019 |
| Date First Available | 28 November 2019 |
| Finish | Black Oxide |
| Finish type | Black Oxide |
| Head Style | Cylinder |
| Head style | Cylinder |
| Item Package Quantity | 1 |
| Item Weight | 3.04 Kilograms |
| Item diameter | 8 Millimeters |
| Item model number | emk05 |
| Item model number | emk05 |
| Manufacturer | PQY |
| Manufacturer | PQY |
| Maximum shear strength | 132 ksi - 176 ksi (97.9 MPa - 121.5 MPa) |
| Number of Items | 1 |
| Number of pieces | 90 |
| Package Dimensions | 22.7 x 12.5 x 5.6 cm; 3.04 kg |
| Part number | emk05 |
| Shape | Round |
| Thread size | M11 |
| UPC | 781829867820 |
S**.
Bought after I watched the guy who tested them on YouTube. All went in great on my LS gen 3 (LM7). Used the ARP torque spec sheet 25-50-70 with ARP lube under the nuts. MAKE SURE TO CLEAN AND BLOW OUT THE BOLT HOLES BEFORE INSTALLING! Will see how long they last; I’m guessing a long while! And yes there’s enough clearance for your exhaust manifolds!
K**T
Fit my 2001 gmc sierra 1500 with the 4.8l vortec. Good option for a stock replacement. Does not come with torque gease. I followed arp's torquing instructions
S**N
The torque test channel on YouTube tested these and they scored very high for torque before fatigue especially with cost. I was able to torque my 6.0l aluminum heads HOWEVER, one stud had thread damage from factory and I had to run a die down the threads to cut the threads from factory to be usable. I didn't bother messaging the vendor however but be aware that these are cheaper than ARP by alot and have their own quirks because of that.
C**T
Used these on my ls3 build. I actually torqued them down then had to remove the heads a second time because i installed a cam and wanted to change my lifters. So i actually torqued them down twice and they held. Stock build so im running 75 ft/lbs with no issues so far. Used the specs from ARP website but did not go to 100 ft lbs.
T**N
Complete junk! One jumped out of the block when it broke. I found it on the shop floor! They Didn't last long enough to finish assembling the engine!
Trustpilot
5 days ago
2 days ago