ARP Main Stud Kit

This complete set of 20 studs, 20 washers, 20 hex nuts and 10 side bolts with oil tight washers are made by ARP (Automotive Racing Products) and are strongly recommended for high performance engines, especially for force induced engines or for aftermarket head gaskets.

These studs are specifically made for the Lexus 1UZ-FE (GS400/LS400/SC400), 2UZ-FE (LX470, GX470), and 3UZ-FE (GS430/LS430/SC430) engines. This kit will make your 6 bolt main to 6 stud/bolt main and will make your bottom end indestructible.

ARP uses a premium grade 8740 alloy that is rated far superior to "aircraft" quality. Each stud is placed vertically in special racks and precisely heat-treated to 200,000 psi. This procedure ensures complete heat penetration and the results are far superior to those lesser quality studs.

Here is how the lower main bolts look like in 1UZ and 3UZ.

Here is another close up picture of the 6 bolt main. Solid design.

Here is a picture of the side bolt.

Here is a close up picture of the side ARP side bolts.

Here is how it looks like installed in the engine. Much cleaner compared to the stock bolt on the lower left.

Here is a close up of the 3UZ-FE ARP Main Studs and Nuts. Its a perfect fit.

Here is how the ARP studs compare to stock 1UZ-FE studs.

Here is another picture of the side bolts between the ARP and stock.