T.Rex always featured massive guitar riffs like the one in “20th Century Boy” which was released as a single in 1973. It went to #3 in U.K. and appeared later also as bonus track on the reissue of their 1973 album Tanx. Written by group leader Marc Bolan, the track was produced by Tony Visconti, who also worked with David Bowie and others.
GUITAR only (Marc Bolan R.I.P.):