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Atomic Performance Products
Atomic Barra Heavy Duty Timing Chain Kits
Atomic Barra Heavy Duty Timing Chain Kits
SKU:306620-K-B
Regular price
$469.00
Regular price
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$469.00
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Atomic Heavy Duty Timing Chain System
A New Generation of Timing Parts for Barra Engines
INSTALLATION WARNING: Correct timing is critical. DO NOT MANUALLY ADD TENSION TO THE GUIDE! See detailed notes below.
Choose Your Configuration
Complete Kit:
The Total Solution. Recommended for most engine rebuilds and upgrades.
- Billet Curved Guide
- HD Timing Chain
- Billet Chromoly Pivot Bolt
- Plus: Billet Crank Sprocket
- Plus: Atomic Street Billet Tensioner
- Plus: All upper/straight Guides, Bolts, Seals & Gaskets
Basic Kit:
The Essentials Upgrade for budget-conscious builds.
- Billet Curved Guide
- HD Timing Chain
- Billet Chromoly Pivot Bolt
Core Kit:
For builders with their own sprocket & tensioner.
- HD Timing Chain
- All Guides (Curved, Top, Straight)
- Billet Chromoly Pivot Bolt
Tensioner Kit:
Targeted upgrade featuring the billet tensioner.
- HD Timing Chain
- Billet Curved Guide & Chromoly Pivot Bolt
- Plus: Atomic Street Billet Tensioner
Sprocket Kit:
Targeted upgrade featuring the billet crank sprocket.
- HD Timing Chain
- Billet Curved Guide & Chromoly Pivot Bolt
- Plus: Billet Crank Sprocket
The Atomic Timing Ecosystem
A fully engineered, race-proven timing solution. We don't just replace parts; we upgrade the entire architecture to survive everything from a stock rebuild to a 2500hp monster without sacrificing NVH or reliability.
Critical Engineering & Installation Notes
- Installation: Correct timing is absolutely critical. Failure to follow the included instructions can lead to severe engine damage. DO NOT MANUALLY ADD TENSION TO THE GUIDE! Let the hydraulic tensioner do its job.
- Head Gasket Thickness: This kit is designed for head gaskets 1.0mm thick. Using thicker gaskets (e.g., 1.8mm) may over-tension the chain or severely affect tensioner operation, making installation difficult. Contact Atomic for questions if running thick gaskets.
- Timing Cover Clearance: You must USE DOWELS ON THE TIMING COVER as per factory assembly. Without dowels, your timing chain guide will likely hit the cover and snap. Every factory casting is slightly different—we strongly recommend using Blu-Tack to confirm a minimum of 2mm guide-to-cover clearance. Check this immediately after installing the tensioner, before the engine is run and the tensioner extends due to oil pressure.
- Break-In Procedure: Upon first start, it may take a few minutes for the hydraulic tensioner to fully take up slack. Do not use high RPM whilst the oil is cold to try speed up the process. You risk excess tension on the chain and forcing the tensioner to lock in an over-tensioned position.
- Failures & Warranty: Failures are VERY rare on these parts (manufacturing defects are lower than 1 in 1000). Harsh tunes, aggressive limiters, and drivetrain problems (high line pressure, harsh shifts, clunky diffs) introduce massive shock into the system that breaks parts. We cannot warranty our products against operation outside of healthy functioning engines.
