Upgraded Billet 3 Piece Idler Kit for Chrysler Crossfire SRT6 (2004-2008) 3.2L

CNC Billet 3-Piece Idler Kit for 2004-2008 Chrysler Crossfire (ZH)

What it Does: The Upgraded Billet 3-Piece Idler Kit replaces failure-prone composite factory pulleys on the 2004-2008 Chrysler Crossfire SRT6 to prevent belt slip, bearing seizure, and thrown supercharger belts under boost.

The Stock Chrysler Crossfire Pulley Weakness

The factory front-end accessory drive on the supercharged ZH chassis relies on molded nylon composite idler pulleys. Under continuous thermal cycling and the high parasitic drag of the Lysholm twin-screw supercharger on the M112K engine, these composite units flex and deform. Over time, engine bay heat embrittles the plastic, while aggressive RPM changes cause bearing bore distortion and micro-wobble. This structural failure leads to belt misalignment, premature serpentine wear, chirping, or catastrophic pulley disintegration that can sever adjacent coolant hoses and throw the supercharger drive belt under heavy load.

The Engineering Solution

Engineered to resolve factory deflection, this 3-piece kit is precision CNC-machined from high-strength billet aluminum to maintain zero runout across the entire engine powerband. The ribbed upper idler features a dual-bearing configuration to handle the massive radial loads exerted by the supercharger belt during high-boost throttle snaps. The two 90mm smooth billet idlers incorporate custom protective bearing shields to keep road debris and brake dust out of the sealed ball races. By replacing plastic with heat-dissipating billet aluminum, bearing operating temperatures drop, belt traction is stabilized, and harmonic resonance across the accessory drive is eradicated.

What's Included

• 2 x 90mm smooth billet idler pulleys with bearing shields
• 1 x ribbed billet idler pulley (approx. 64.6 mm belt-surface diameter)

Technical Specifications

Compatibility

• 2004-2008 Chrysler Crossfire SRT6 3.2L M112K Supercharged V6 (Coupe & Roadster)

Frequently Asked Questions & Fitment Warnings

Does this fit the ZH Crossfire?

Yes, this is a direct fit for the 2004-2008 Chrysler Crossfire equipped with the supercharged M112K engine. This kit does not fit naturally aspirated 3.2L M112 Base or Limited Crossfire models.

Are modifications required to install this kit?

No, this is a bolt-on replacement engineered to fit the factory mounting points and utilize the OEM serpentine belt routing.

The Chrysler Performance Caliber

Engineered for the high-revving demands of the supercharged Karmann-built platform, this billet kit provides the mechanical durability and structural stability required to keep boost delivery uninterrupted on track or street.