[tmerc]

I don't know about the federal level, but in NY State, the rule on engine swaps allows for a newer engine to be installed in an older car as long as the newer emissions equipment is installed as well. So swapping a 2010 k series motor into a 90s civic would be legal if you also bring the ECU (because obd counts as emissions) and the catalytic converters. At least that was my read of the law.

[roflchoppa]

My buddy and I did a California BAR swap of a k20a2 into a civic EG. The things a ripper.

We also had to bring over all the emission EVAP stuff, for the evap on the RSX tank (plastic irrc) we bought a new EG tank and welded all the necessary fittings to get it to work.

Very engaging car to drive.

[tmerc]

I was looking at buying something similar on cars and bids a couple of years back that didn't have cats, so I looked into the law in ny. I've been in a stripped eg with a similar motor at an autocross and it does rip. Loose rear and front grip with an 8200rpm redline? Heck yeah. Would recommend looking up your nearest scca and going out for a day to see what it does at the limit