I'm the 3rd owner of this very-cherry 1988 coupe with tinted windows and saddle leather buckets. The 350 ci. engine is all stock internally, with the 700R4 o.d. automatic tranny and 2.59 rear end. It has a CatBack Flowmaster exhaust, K&N air filter with an open air filter lid and a throttle body air foil. It cruises on Yokohama's with the rare early 1988 standard 16" aluminum wheels. I average 26 mpg on the open road at 75 mph and 18 mpg in city traffic. It has 155,000 well babied miles, with alot more to go. C-4's are the best! A great car.