Rubber engine mount. Fits 1970-1972 455 and 1978-1985 307-350N-455 engines. Sold each. Mounting holes are 2 1/2" apart. Use with DMR-3-1108-G Polyurethane transmission mount for street use which fits a GM T-350, T-400, or Powerglide. Recommended for street use. Use on passenger side with a DMR-5400-SM steel mount on the drivers side to eliminate the need of a torque strap. Not returnable if mount has been used or bolted on. Be sure it is the right mount before bolting on.