Fall-Line Motorsports F82 M4 GTS Replacement Lower Splitter S4 (B5) mold and manufacturing is completed

mold and manufacturing is completed in RKP's US facility

The only TRUE plug and play solution compared to the rest

Varied core combinations using 26

Innovative 2-core in-series system

To ensure the smoothest flow possible we use our Patented filter housing coupled with a CNC machined MAF tube to ensure the smoothest possible flow to the turbo

Fall-Line Motorsports F82 M4 GTS Replacement Lower Splitter S4 (B5) mold and manufacturing is completedMADE IN THE USA. BMW M has always maintained a unique approach to engineering. No matter how rare an M car may be, M owners always expect a car that is at once stylish and discreet; useable every day and flawless around a race track. Balancing these conflicting requirements are what make BMW M absolutely unique in the world of sports cars. The M4 GTS is particularly special in this regard, because it is a true collectors item. Unlike most collectors