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🔧 Upgrade your Chevy’s heart with studs that mean business!
The PQY Cylinder LS Head Studs Bolts Kit is a premium-grade, 12-point stud bolt set engineered for Chevy LS engines from 2004 to 2019. Featuring centerless ground, heat-treated alloy steel with a tensile strength of 180K psi and a high-temp black oxide finish, this kit ensures superior durability, precise torque application, and direct compatibility with multiple LS engine variants. Complete with all necessary studs, nuts, and washers, it’s the ultimate upgrade for professional-grade engine performance and reliability.
| ASIN | B0B4FP6GBT |
| Best Sellers Rank | #90,835 in Automotive ( See Top 100 in Automotive ) #19 in Automotive Replacement Engine Head Bolt Sets |
| Brand | PQY |
| Color | black |
| Compatible Groove Diameter | 11 millimeters |
| Customer Reviews | 4.0 out of 5 stars 97 Reviews |
| Exterior Finish | Black Oxide |
| Fastener Size | M11 |
| Fastener Type | Stud Bolt |
| Finish Types | Black Oxide |
| Grade Rating | Grade 2 |
| Head Style | 12-Point |
| Item Diameter | 11 millimeters |
| Item Hardness | Grade 2 |
| Item Highlight | 12-Point Cylinder Gasket Head Stud Bolts Nuts Kit for LS1 LS3 5.3L 5.7L 6.0L /LS6 L98 4.8L 5.3L 6.0L Engines |
| Manufacturer | PQY |
| Manufacturer Grade | Grade 2 |
| Material | Alloy Steel |
| Material Type | Alloy Steel |
| Maximum Shear Strength | 420 MPa |
| Metal Type | Alloy Steel |
| Model | 234-4317 |
| Number Of Items | 90 |
| Number of Packs | 1 |
| Number of Pieces | 90 |
| Part Number | 234-4317 |
| Screw Head Style | 12-Point |
| Screw Point Style | 12-Point |
| Set Name | PQY 12-Point Cylinder Gasket Head Stud Bolts Nuts Kit |
| Size Name | for 04-19 Chevy |
| Thread Size | M11 |
| Thread Style | Right Hand |
| Thread Type | Metric |
| Unit Count | 1 Count |
C**Y
Save $250 over arp
Great stud kit. One nut wasn’t threaded, ordered a replacement set and all was well. Followed arp instructions, used arp lube. Zero issues.
C**N
So far so good
bought them 3 months ago and they are holding up great. Didnt use any loctite. I was worried they may stretch or loosen up but so far nothing. Update a year now and zero problems.
R**N
Stud broke in block
Following proper torque sequence, torques to 35 ftlbs, then 70. Went for 100ftlbs and the first stud snapped. unable to retrieve the broken stud, therefore my block is trash. Spend a little more money on the better stuff. saving $200 isn't worth the $1200 machine shop bill.
J**L
Worked great
Worked great, came with a extra stud but other than that all the washer and nuts fit correctly. Made sure to put the flat-side of the washer down on the head and oiled up the nut and threads and went slow on torquing. 25-50-75 with no problems.
D**D
Good product for the money
They definitely worked. I researched them, the breaking load is not awesome. Don't use on high horse power car.
S**.
Use ARP torque specs!
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!
E**K
Nice
Used these on a problem engine, I’ve currently re used them 4 times and they are great. I torqued to 80 ft lbs
C**G
Arp alternative
Used arp torque sequence for their studs and there lube. Everything tightened perfect. There is someone who tests these on youtube and they compare with arm strength
S**N
Very good for the price but...
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.
K**E
These are not worth the price of doing the job twice.
The heads of the nuts are various sizes, not a great thing to see. Some of the studs wobbled when turned in. I took them all out and bought a set of new ones from Fel Pro. All ten of the long studs were too long and all the short studs are too short.
Trustpilot
2 months ago
2 weeks ago