false 3757232 1 This guidebook takes do-it-yourself enthusiasts through practical methods for increasing the performance of British automobile engines by modifying cylinder heads. Completely illustrated, the instructions explain common practices and are written for both amateurs and shop pros. 3801105 1971 The theory and practice of cylinder head modification 0 0 1 0 0 0 false false Wed Sep 30 00:37:13 -0700 2009 Wed Sep 30 00:37:13 -0700 2009