Stroke/destroke to 90mm and REV IT! Combine with 83.5mm bore cylinder bore for 1970cc displacement vs. standard 1984cc. Or, go the full VW Motorsport route with 84mm for 1995cc (and very thin cylinder walls, too). This is the ultimate forged racing option.
Optimize pistons plus rods and an uncommon bottom end will be yours to thrash HARD. Run high compression, improve the cylinder head, and install aggressive cams. Make sure that transmission ratios are tightly spaced and short. Lightweight all motor cars will FLY. Or, go big turbo (with wider ratios) and enjoy a powerband that feels limitless.
Fitment is direct for 038, 06A, 06B, 06D, blocks, etc. Stroke is 90mm stroke and journal size is standard 47.758mm.