From REDS Racing:
REDS Racing is pleased to introduce a newly designed exhaust manifold with innovative features. The new design connects the manifold to the engine for a much better fit. The end result improves the strength and durability of the spring retainers. The new design also provides improved cooling in the exhaust area to guarantee longer life for the gasket. All these features provide lower cost of maintenance.
- M (Medium) is recommended for short tracks where more bottom torque is required, top speed will be lower.
- S (Short) is recommended for medium or standard tracks; it is a good compromise between torque and top speed.
- XS (Extra Short) is recommended for tracks with long main straights and to achieve the highest top speed but lower bottom torque.
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