SKU 00499094-1710 is the steel base-mount sub-frame for the Mitsubishi Lancer Evo 8, covering the 2003 to 2005 production run. It sits in place of the standard seat runners and accepts any base-mount sport seat using the 345mm x 271mm bolt pattern, which includes seats from Sparco, OMP, and Corbeau. It is not limited to Sparco seats despite the branding.
Both driver and passenger sided versions are listed for RHD cars. This listing covers one sub-frame. If you are fitting two seats, order one of each side.
The Evo 8 is a popular track and modified road car, and getting the seat lower is usually the priority. Base-mount sub-frames sit slightly higher than a side-mount competition setup, but they work with the original floor fixing points without modification, which keeps the build reversible for a car that may need to go back to standard.
The Sparco sliding runners (SKU 0049306 single, SS0049302-X2 pair) add fore-aft adjustment between the frame and the seat if needed. They are not competition-rated but work for road and track day use.
One thing worth noting on the Evo 8: the cabin is relatively narrow compared to modern performance saloons, which affects which seat shells fit cleanly. The R100’s slimmer bolster profile is often recommended for this car specifically, though this sub-frame accepts any seat in the range. Measuring the widest point of the seat shell against your cockpit clearance before ordering is worthwhile.
