Highly recommended to Track Focused Lotus! The Larini Race Exhaust Pipe is a high temperature resistant, muffled pipe, which replaces the highly restrictive OE catalytic converter. Exhaust flow is completely unobstructed through this 'straight-through' component and as result there is an extremely noticeable power gain (requires additional tuning). Reduces sound 1-2 dB to help keep cars noise compliant on the track and quieter cruising on the highway. Temperatures are reduced too, as accelerated gas-flow minimizes engine-bay temperatures by dissipating heat more effectively.