Jeff you might wanna get your facts straight with reagrds to the differences between the motors.
The JDM DC5R with K20A engine has exactly the same part number for the head as the Australian DC5R with K20A2 engine. The part number is 12100-PRB-A00.
The K20A engine has a compression ratio of 11.5 to 1 while the K20A2 is 11.0 to 1. Different pistons in the K20A. THIS IS THE MAJOR DIFFERENCE
The early K20A and K20A2 had exactly the same valves, springs and retainers according to the parts manual. The springs changed a little by the time the 2004 model arrived, but essentially the same still.
Both engines have the same head gasket exactly according to the parts manual.
Same crankshaft part number for K20A and K20A2 (13310-PRB-A00).
Connecting rods also have exactly the same part number.
K20A has a different part number for the crankshaft pulley (13810-PRC-003) while the K20A2 is 13810-PRB-A01. The K20A pulley could be lighter or slightly different diameter. Only guessing here. I might check it out sometime and find out the difference.
K20A has a lighter flywheel (22100-PRC-003). K20A2 flywheel part number is 22100-PRB-003.
The Type S makes an extra 7kw through a slightly larger intake manifold (jdm i am guessing) and slighlt larger exhaust than the Aus Type R. Everything else is the same as the A2 as far as i am aware.
All in all intake/exhaust/headers are the first engine mods most ppl do.
Personally i prefer the R, due to the recaros and momo wheel, etc. I track race my car once a month and have yet to see a dc5r at the track with an aftermarket seat in it. Car makes 150kw atw and is within 1-2sec of the lap times of a friends GT3 Porsche and in a straight line is as fast as the evo 8-9's making 180-190kw atw.
I like the styling of the front end of the S as well as the wheels and cd player but other than that i'd happily take an R over an S![]()
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