One of USP Motorsports' in-house brands, Spul Engineering produces go-fast parts for VW and Audi vehicles. With Spulen parts you get more efficient operation, so your tuned car shifts smoother, accelerates faster, and handles better. Spulen offers products such as bolt-on manual transmission mods, dog bone mounts and inserts, turbo inlet and boost pipes, oxygen sensor extenders for test pipes, wheel spacers and bolts, blow off valve kits for MQB MK7 applications, and rear differential mounts for Audi vehicles.