I just happen to see this on KingMotorsports site regarding the BC Spec3 exhaust. It says 98-01....so why not 97? It didn't seem like a type-o, since they list the same thing for the spec 2 & 4. I wasn't aware of any kind of exhaust difference in a 97 vs 98+:

Buddy Club Spec III Exhaust System

Buddy Club SPEC III exhaust systems are the lightest stainless-steel exhaust system on the market today. Its simple straight thru design creates an increase of exhaust gas velocity in order to enhance its efficiency. The resonator on the main pipe is specially designed to enhance torque in the low to mid RPM range.

Spec III Exhaust System Integra 1998-2001 Type R

I searched H-T to verify, but I don't see anything specifically. I just wanted to verify here with the ITR Pros before I get one for my 97.

 

Probably just a typo. They're the same, and that's a great exhaust! Pick it up!

 

not sure for the 97R, but i own the specIII for my ep3 and its sick...deap throaty tone, sounds nice....