🔧 Spectre Performance 4699 Harmonic Balancer Bolt: Enhanced Engine Efficiency and Stability Review

I bought this to replace a crankshaft bolt on a 2000 Chevy Blazer 4.3L. I removed the old one and it was a good quality replacement.

When you try to tighten the leveling screw, the lock washer will loosen and pop out. Better get rid of everything together. Just attach a small padlock.

This screw is 1/4 inch shorter than the original screw, making it impossible to mount the pulley and harmonic balancer. waste of money. Revain if you read send me a refund!

Product Length NOT 2 1/2 inches. That's 2 1/4 inches. Total length including head is 2 3/16 inches. It was important because with the thick washer there wasn't enough thread to hook.

The bolt was too short in thread depth and length. If you're using the stock crank pulley, you'll need a longer bolt, about 1/2 longer than the class 8 bolt, which is thick enough for washing machines and pressure washers. Bought for my 68C10 SBC 350

I don't know why others have trouble with this. It's a little longer than my stock screw and the washer is a little thinner than stock. Overall, the Specter is slightly longer with its shim and fits well. I use Loctite, not the lock washer that comes with the kit. The cost is low only because a screw and washer is expensive.