Rank 1: Straight Line Performance
Widely recognized as the premier performance shop in the Flathead Valley. They specialize exclusively in high-horsepower builds, tuning, and modifications for American muscle cars, with a significant focus on modern Dodge platforms. Their team has the technical expertise and diagnostic equipment for complex SRT, Hellcat, and ZF transmission systems.
Specialties & Features
- Hellcat/Demon supercharger service
- Custom performance tuning
- ZF 8-speed transmission upgrades
1305 US Hwy 2 W, Kalispell, MT 59901 (Serves Columbia Falls)
Business Information
- Licensed: Yes
- Insured: Yes