On a modified block, oil can find its way up past the distributor housing and cost you pressure where you need it. This O-ring kit seals the housing to the block on Chevrolet billet distributors, and it is also the service part to reach for any time the original O-rings have taken a set or been nicked during removal.

MSD 8494 Distributor O-Ring Kit Features:

• Fits all Chevrolet billet distributors.
• Seals the distributor housing to the block.
• Helps control oil pressure on modified blocks.
• Direct replacement service part.