Crusader High Profile Exhaust Riser | Barr Marine CR-20-29015 Barr Marine replacement 4 inch Crusader exhaust elbow used on the center rise manifold design. Crusader High Profile Exhaust Riser | Barr Marine CR-20-29015 Barr Marine replacement Crusader 4 inch exhaust elbow For Crusader V8 small block 305 and 350 cu. in. engines with center riser exhaust manifolds For Crusader V8 big block 454 and 502 cu. in. engines with center riser exhaust manifolds New version reduces the chances of water intrusion back into the engine 1-3/8 inches taller than the original CR-20-98126 version – may not work for some applications due to engine room height limitations and Barr CR-20-98126 will need to continue to be used For use with 4 in. ID marine exhaust hose Heavy duty cast iron painted Crusader blue Includes mounting hardware and gasket Replaces Crusader R029015 Replaces Osco 9015