This JL 4 Race Expansion Chamber will give you the most increased power for your modified lambretta engine. It is suitable whether you have a cast barrel or a TS1 barrel (both stubs supplied). Out of the JL range it will give the most increased performance.
This pipe can be fitted to race scooters and highly tuned road going scooters. It is not ideal for bolting onto standard engines. For these see the JL3 expansion chamber.
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