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S2 Exhaust SystemAs of June 2001, Lotus sold an after market sports exhaust for the S2 (part no. LOTAC05107), made by Janspeed and priced at £492.35 + VAT. Janspeed went into receivership, leaving Lotus with a supply problem that had a knock-on effect on the delivery dates of the Sport 135 upgrade kit.
As of Jan 2002, Lotus aftermarket sports exhausts are produced by CLF (Magnex in the retail world). Power increases of about 5% can be expected along with an improved sound track. The exhaust has been configured to not trip the check engine light but fitting a catalyst replacement pipe definately will. Legally, if the light illuminates, you are required to return the car to the dealer to be checked. Third party exhaust systems are not generally Lotus approved and will invalidate any engine related warranty. Lotus now only sell a stainless-steel sports exhaust for the S2 (part no. LOTAC05108) at £419.02 + VAT.
Catalyst Replacement PipesReplacing the catalyst on the S2 is not possible legally and will normally trigger the OBD warning light. Recent tests have shown that on most cars it has not triggered the MIL yet if the sensors are left in place. Lotus assure owners that it will eventually. The catalyst replacement pipe has two small mounting points for the sensors.
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Copyright © Rob Collingridge 2009 - Last updated 04 Jan 2004