GURU Racing can supply a two piece eccentric shaft for a 13B engine that substantially reduces eccentric shaft flex as well as providing extra bearing surface area. The end result is increased horsepower with substantially increased reliability!

The unit is especially designed for exceptionally high horse-powered and high revving engines, where bearing fatigue and crank flex is detrimental to engine reliability.

Technical Specifications:

Applications:

Currently delivered for all 13B Mazda engines
Suits Mazda RX7 models (Generation 1 - 3, Series I - VI)
Suitable for road and race applications
General:

30% more bearing surface area than a standard 13B Shaft
Helps reduce bearing failure & fatigue on high boosted turbo engines
Helps eliminate crankshaft flex at high rpms
Reduces crankshaft flex therefore rotor clearance can be set to a minimum and seal clearances can be set tighter for increased horsepower
Stronger
1.2kg lighter than a "standard" eccentric shaft
Kit supplied with all components (including needle roller bearing) and specifications for centre housing machining to fit the centre bearing.