Tri-Mil Dual Quiet Pack Exhaust System, Type 4 Engines with Oval Exhaust Port in Beetle, Super Beetle, and Karmann Ghia, 1 1/2" Tubing - Aircooled.Net VW Parts
Air Cooled VW Bug Me Video DVD, Type 4 Engine Conversion for Beetles | eBay
Raby Aircooled Technology – The Most Advanced Aircooled Engines for Vintage VW and Porsche cars.