Maisto’s 1:55 (approx) Acura RSX is from their Excess Tuner series. The cars have bodykits and an aftermarket rear spoiler. Flashy graphics are on the side of the car. The bottoms are casted with “Acura RSX”, “Maisto” and “Made in China” with an reasonably correct undercarriage layout.
Ebbro has both the DC2 and DC5 versions of the Integra/RSX in 1:43. The DC2 Integra Type R did not have any detail on the bottom, as was typical with Ebbros of the time. A variation included Mugen Integra versions.