Product Description

TIME-SERT 37004 Big Sert Insert M11x2.0x30. This is the replacement Big Sert (oversize) insert that comes in the 3700BS and 3700BSAO universal headbolt kits.

 Remember TIME-SERT is recommended by leading car manufacturers like the General Motors Corporation. In fact TIME-SERT is GM's only authorized repair for head bolt threads.