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I am in Okinawa, Japan and have an M35 Stagea 300RX RWD with VQ30DD. I have done a few mods to it and was very interested in what types of after-market parts will work (cross reference) from the Skyline VQ series, G35/37, and VQ series Z cars. So far, I have added a JP Simple Style front lip, Infiniti G37S Akebono front brake kit, R35 GTR early model 20-inch rims, Tein suspension. Right now I am interested in intakes, plenums & engine/harness covers, and exhaust systems. I believe that most if not all of the plenum (spacers) and intake mods (Z-tube, Stillen, JWT Pop-charger) should bolt right up. I was debating on whether to go with the Kinetix V+ plastic plenum or to go with the MD 5/16" spacer with ISO thermal kit. And as far as intakes, the Stillen w/ Z-tube looks best considering the cold air box and how hot it is here most of the year. Do all of the front strut bars from the Skylines and Z's bolt up with no issues? I realize that there is somewhat of a selection of exhaust systems for the Stagea, but would the G35 sedan exhaust systems match up? If not, what is different? I just ordered a stock G35 coupe mid-pipe so I'm hoping that it bolts right up without an issue. I heard that all of the mid-pipes measure the same length except the Z cars which are shorter. Is there any more info that people can share? Are the headers, cat pipes, y-pipe (or xyz? pipe), and axle back mufflers all basically the same from one car to the next? I was considering getting an axle back muffler like HKS or Fujitsubo offers for the Skyline 350GT sedan but not sure if it will fit.