70mm Decat with Japspeed Exhaust
 

Hi all,

I'm running this Japspeed cat back exhaust system which has 2.25" bore with twin 4" slashed tailpipes which I won on eBay brand new for a steal at £120.

Japspeed Catback Link:
http://www.japspeed.co.uk/honda-s200...st-system.html

I have been offered a Skunk2 70mm decat pipe for a decent price.

Skunk2 Decat Link:
http://www.tegiwaimports.com/skunk2-...nda-s2000.html

Japspeed sell their own 2.25" (57mm) bore inlet, 2.5" (63.5mm) bore outlet decat pipe on their site.

http://www.japspeed.co.uk/honda-s2000-decat-pipe.html

Is it ok, good or bad to run a 70mm (2.75") decat with my 2.25" (57mm) exhaust?