Piston Ring/Piston - Information

Older Engine Updates

'86-89 Accord, '85-87 Prelude Si:
When installing new piston rings, P/N 13011-PH4-751, the dark colored ring marked "T" goes in the top ring land and the chrome ring marked "2T" goes in the second ring land. The dark colored ring isn't an iron ring, it's a steel ring that's been nitrided, making it tougher than the chrome ring.

'86-87 Civic Si, '85-87 CRX Si:
Replacement pistons for these models work in all four cylinders. Previously, cylinders one and three used different pistons than cylinders two and four. Install these pistons with the arrow pointing toward the intake manifold.