NISMO Front Strut Tower Bar For Silvia S15 SR20DET 55420-RNS51Brand NISMO Series Name Rear Strut Tower Bar Product Descriptions The bar itself is in aluminum alloy, round tubing (with black crystal paint) with a turnbuckle in steel. All the bars are adjustable. The bar base, which is designed to attach the tower bar solidly to car body, is in steel (with red crystal paint)., Application: Standard rear speakers vehicles (except for the Barietta) Product Number 55420 RNS51 Compatible Vehicle Silvia S15 Engine