Like the title say's.

 

i think its 60 mm...could be mistaken though...anyone wanna confirm for me

 

i'm 99.9% sure it's 60mm as all other greddy's, except those for turbo apps. why not just call up Greddy themselves?

 

here u go: 60MM

http://www.greddy.com/products/exhaust_frame.htm


Acura
Part # Description Year Piping Tip List Price
10155560 Integra LS/RS 2 dr. 1994-99 60 100x110 $590.00
10155562 Integra LS/RS 4 dr. 1994-99 60 100x110 $590.00
10155561 Integra GS-R 2 dr. 1994-99 60 100x110 $590.00
10155563 Integra GS-R 4 dr. 1994-99 60 100x110 $590.00
10155690 Legend 2dr 1991-95 60 120x130 $650.00

 

60mm which is also equal to 2.36in