Stiegemeier Porting Services rebuilds and upgrades superchargers for automotive and marine use. We specialize in Eaton, Whipple, Magnuson, Mercury, and MINI units, offering precision porting, repairs, and full restorations. Every rebuild is done with quality components and proven methods to improve performance, reliability, and airflow efficiency.
Top Quality! Came through in a pinch. Everyone with higher miles on the R53 Mini needs to get a rebuilt supercharger. It’s not shared at all on social media the value of new bearings, seals, & recoating the rotors.
April 2026
This shop is the greatest. My whipple was sent there and their service is second to none!
February 2026
Sent my blower in for a stage 8. Customer service was Fantastic and i was super surprised with how quickly they got it done! ready to get it on the car. Thank you guys
