This is the self sealing special stepped seal for the Pontiac 400 & 301 Pontiac exhaust manifold collector pipe junction.
- Designed to seal minor surface irregularities
- No re-torque required
- Siz is 2.35 inches ID.
Save yourself the grief.. these are not a regular part everywhere.
.jpg "Sill Plate Set: 55-57 Chev / Pont 4 door Pillarless")
