Engine movement (deflection) is wasted horsepower, and that power is yours BMR Suspension wants you to take it back with its billet aluminum solid motor mount upgrade. If you have a BMR Suspension K - member with integrated engine mounts, BMRs new solid motor mount upgrade (MM006) eliminates all engine movement allowed by the polyurethane engine mounts that come with the K - member. This gives you maximum throttle response on the street and track. BMR manufactures its MM006 billet motor mount bushings from black anodized 6061 billet aluminum, eliminating all engine movement.