Sold alongside the Super Seven, the S3s came with their Ford engines in a saner state of tune, though all sizes from 1300-1600 were available. Tuning options came from Holbay, not Cosworth for these. This is the car that was revived officially by Caterham and unofficially by everyone else, but the 350 or so originals command a decent premium for all that heritage. Still largely sold as kits originally, which means fit and finish has always been variable, and is likely to have been redone several times over a car’s life. Hard to value, but the fun factor is always the same.
info from Octane