We're answering some viewer mail from Muscle Car Of The Week comments, including explaining exactly what a compression ratio is regarding an internal combustion engine. We also discuss the red inner fender wells of a 1969 Oldsmobile 442 W-30 car. Plus, someone asked about the 429 Super Cobra Jet engine in a Ranchero GT and if it was the same as the Boss 429 Mustang engine. (Spoiler... it's not.) We welcome questions about the cars from The Brothers Collection here on Muscle Car Of The Week, and

How to properly calculate compression ratio with MAHLE Motorsports Engineers. For more tech info and to download our application guide visit www.mahlemotorsports.com | MAHLE Motorsport North America