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| Joined: | 07-16-2014 |
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| Posts: | 200 |
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I've got the Lotusbits big bore exhaust system fitted to my GT and I can't recommend it highly enough. I don't compete in my Jensen, but the exhaust certainly frees up the engine and also quietens it down a lot when I'm pootling around town. I've had no issues with ground clearance with the front silencer (which replaces the front and middle silencers in the stock system). I also second Mike's view re the airbox - with an unrestrictive exhaust system the stock (muffler type) airbox is restrictive, even with a decent K&N filter. Mike found this when dyno testing my GT after upgrading the engine to Lotus spec 10 - replacing the stock airbox with the Excel type increased bhp by over 20%. In terms of originality for autocross purposes, a few of the very last J-Hs (and a majority of the GTs) were fitted with the T75 engine with the Eclat/Elite airbox, so you might be alright.
Hope this helps.
Best wishes,
Nigel