timing chain dampner LS1
Phil
Black 12588670 this one has bolt centers about 1.8 inches apart.
Tan 88958607 this one has bolt centers about 2.2 inches apart.
You need to measure your block for bolt pattern then chose the proper part. The tan is around 100.00 dollars, the black is around 10.00.
I measured the different parts with a scale by eye, the numbers will get you close enough to buy the right one.
Kurt
Phil
Some of the later LS1 blocks had the bosses, but were not drilled. so if that's the case you could probably get away with the black one.

