THE BENCHMARK IN HEAD BOLT THREAD REPAIR
The NS300L™ insert system has become the benchmark for repairing aluminum engine blocks.
The NS300L™ Insert System is a head bolt thread repair system originally engineered with great success, to outperform all other repairs on the market for the Cadillac Northstar engine. Since it's conception, the NS300L™ Insert System has become the preferred thread repair for many other aluminum engines as well, including the Toyota 2.4L 2AZ-FE. Although other systems may make the claim of having an "approved" kit by many automotive manufacturers, the NS300L™ kit has developed the reputation of being a "confirmed" repair. There's a big difference between "approved" and "confirmed", especially when you figure the expense of a possible failed repair.