Probably been answered 1,000,000 times but didnt find anything on search

Better flowing exhaust? headers?

No difference?

 

ehxaust and compression

 

slightly higher compression pistons. I beleive its 11.0-1.

 

headers and shorter cat

 

And I think the Clock block and no arm rest are good for 1 of the 5.

 

Yup and exhaust

 

JDM exhaust = 2.5" mandrel
USDM = 2.25" mandrel

JDM - Didnt it have lighter rods too?

 

IM Me again Bovine I lost your AIM name

 

JDM catback is still 2.25. Only the header is 2.5.

 

no, rods are the same, lightened H beam

 

JDM 98 spec gets header, higher compressions pistons also add the 5 ponies.


[Modified by Rguy, 2:04 PM 5/31/2002]

 

I have a friend who just sold one and measured the ID? Says its 2.5"? I dunno anymore. Oh well.

 

You said Clock Block... that's just so wrong...

 

they are the same diameter, the jdm one is just 6 inches or so longer. Also, jdm itr compression is 11.1:1. Usdm is 10.6:1. The jdm ecu looks for less sensors. You would think will all those differences and the higher octane gas, it would be more than 5hp.