AASCO Motorsports

About AASCO Motorsports

AASCO Performance Inc. was founded in 1995 by brothers Dennis and Randall Aase whose passion for Motorsports has expanded over 80 years of combined experience and expertise in quality race proven parts and services.

AASCO Motorsports High Performance Porsche 911 Valve Spring Kits

AASCO's High Performance 8mm and 9mm Valve Springs Kits for 1965-1998 Porsche 911 engines include valve springs, titanium spring retainers and spring seats. If you are rebuilding your Porsche 911 engine, upgrading to AASCO's High Performance Valve Springs provide superior valve control to help protect from damage from over-rev. These valve springs are custom made for Porsche applications with a higher natural frequency that factory valve springs.