Atomic Ford DOHC (Barra) Heavy Duty Timing Chain Kit

There are 3 options available for the Atomic Heavy Duty Timing Kits. Please read all the information below to ensure you order the correct kit. If you still aren't sure what kit to order, send us a message or give us a call.

#306620-K (with Tensioner but no crank sprocket)

Comprises H/D timing chain, tensioner, guides x 3 (including billet driver's side guide) & CRMO timing pivot bolt. Gaskets/seals for 5/2005 on.

#306620-K-S (NO tensioner but with billet sprocket)

Comprises H/D timing chain, guides x 3 (including billet driver's side guide), billet crank sprocket and CRMO timing pivot bolt. Gaskets and seals included for >5/2005 engines.

#306620-P (Partial kit, NO tensioner OR billet sprocket)

Comprises H/D timing chain, guides x 3 including billet drivers side guide and chrome moly timing pivot bolt. No tensioner, sprocket or gaskets/seals included.

Atomic timing chains for the DOHC Ford 6 cyl are more than 80% stronger than the stock chain and are highly recommended for use with heavier than standard valve springs. They are pre-stretched at the factory and feature rollerised trunnions with extra thick link plates to provide the utmost in reliability. Will fit standard or aftermarket sprockets and have OE style timing links for easy timing.

The best timing chain in the world is no good if the guides do not keep it in place, so we manufacture a heavy duty replacement for the failure-prone OE timing chain guide pivot. CNC machined from 4140 chrome moly steel, Atomic guide pivots feature larger fillet radii in the corners and a 33% larger locking nut (M8 instead of M6) for positive retention of the guide. Heat treated to 55 HRC and black oxided for appearance, Atomic pivots are inexpensive insurance against premature valvetrain failure due to erratic timing chain movement.

Rounding out the cam drive system for the DOHC Ford 6 cyl is our Heavy Duty timing chain tensioner. It features a larger oil feed port to provide more oil pressure to the ratchet and a stronger pawl for more secure engagement. The symptoms of a faulty tensioner are intermittent noises coming from the front/top of the engine, especially when held at a constant RPM.