This incredible solo comes from an album by Pony Poindexter titled Pony’s Express.
It’s hard to understand why this date isn’t better known, considering the front line alone is Pony and Phil Woods on alto’s, Dexter on tenor and Pepper on baritone.
Pepper follows Dexters typically lyrical laid back solo with a blistering solo which demonstrates both his harmonic prowess and absolute mastery of the saxophone.  In bars 6, 7, 8 of each A section he superimposes descending 2-5’s back to the tonic, creating further harmonic interest.