Buy 2004 Mazda RX-8 Base Coupe Exhaust Bolt and Spring. Exhaust System (Complete) - Repair or Replace. Which, Designed, Nut - OEM Mazda Part # UB4065215 (UB40-65-215)

Exhaust Bolt and Spring.
A Spring Bolt, which is a specially designed shouldered Bolt with matching Spring and nut. It is designed to bottom out against the flange, which preserves the Spring's force (acting as a locking measure) without over-compressing it, which can lead to failures during the high temperature cycles found in Exhaust. These Bolts always mount through the flange, with a nut on the backside.

Exhaust Bolt and Spring

Fits Protege

Exhaust System (Complete) - Repair or Replace