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 Spring. Exhaust SpringExhaust Bolt and Spring
Fits 135i, 135is3.0 LITER W/TURBO. W/O TWIN POWER. W/TWIN POWER. Exhaust System (Complete) - Repair or Replace
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Installed price includes part and dealer installation cost, local taxes not included.