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🔧 Bolt up like a pro — don’t let your build settle for less!
The ARP 140-1101 Header Bolt Kit is a premium set of 16 hex head bolts engineered specifically for Mopar Gen III Hemi 5.7/6.1L engines. Made from high-strength 8740 chrome moly alloy steel with a black oxide finish, these M8x1.25 fully threaded bolts provide exceptional durability and heat resistance. Manufactured 100% in-house in the USA, this kit ensures precision fit and reliable performance, backed by outstanding user reviews.
| ASIN | B01N4JFF8D |
| Brand | ARP |
| Colour | Black |
| Compatible Groove Diameter | 8 Millimeters |
| Customer Reviews | 4.6 out of 5 stars 130 Reviews |
| Exterior Finish | Oxide |
| Fastener Size | 8 mm |
| Fastener Type | Hexagon Bolt |
| Finish Types | matte |
| Global Trade Identification Number | 00672036048327 |
| Head Style | Hex |
| Head Type | Hex |
| Included Components | Header Bolt |
| Item Diameter | 8 Millimetres |
| Item Hardness | Grade 8.8 |
| Item Type Name | Header Bolt |
| Item Weight | 0.38 Kilograms |
| Manufacturer | ARP |
| Manufacturer Grade | Premium |
| Material | Alloy Steel |
| Material Type | Alloy Steel |
| Metal Type | Alloy Steel |
| Model | 140-1101 |
| Number Of Items | 1 |
| Number of Pieces | 16 |
| Part Number | 140-1101 |
| Screw Head Style | Hex |
| Screw Point Style | Hex |
| Set Name | 1 Pack |
| Size Name | M8x1.25 |
| Thread Coverage | Fully Threaded |
| Thread Size | 8 mm |
| Thread Style | Right Hand, Metric, Full, 8 mm x 1.25 |
| Thread Type | Metric |
| UPC | 672036048327 |
| Unit Count | 1.0 Count |
S**R
Good product
Great bolts fast shipping
T**H
Nice Hardware
High quality and seem super strong. I did not feel like I had to worry about breaking a bolt while torquing them with odd ratchet and wrench setups due to difficulty in reaching them. I did do a re-torque after a few heat cycles and a few of the bolts did need to be snugged back down. Unsure if that was a result of not enough torque during initial install or if they backed out, but no issues since then. Overall happy with these.
A**O
Ok
Good bolts
J**Y
2019 ram 1500 classic
5.7L header bolts. 7/16 flange these were perfect length. I chased my threads with a tap first...made everything much easier. Especially considering some of these bolts are hard to access. These are meant for headers not exhaust manifolds. I think that's why people are saying they don't fit.
B**B
Because RACECAR
It's an genuine ARP product, so not much else to say really.
Trustpilot
2 weeks ago
3 weeks ago