I have a 4-door Acura Integra LS, with the 142 hp non-VTEC 1.8 liter engine. There were also a 4-door Acura Integra GS-R, with the 170 hp VTEC 1.8 liter engine, made at the same time as my car. There are few if any differences, technical and performance wise, between my car and a GSR sedan.

If I were to swap the engine in my car for a GSR engine, would it unquestionably put me into Street Mod classes? It seems like if I were to do the swap, but didn't want to enter in Street Mod, it should logically be legal for me to enter my car as an Integra GSR as if the GSR engine had come from the factory in my car. Any comments? My car has the sunroof and power locks and windows just like a GSR, so its not like I'm saving any weight.

TIA,
Ben

 

For SCCA, street mod.

For Honda-Challenge, this is legal (since the tubs are the same)

 

AFAIK, You can swap in the GSR engine and even still run in the stock class so as long as you swap over all the parts, ie options, trim etc. not just the engine and essentially create an exact replica of a GSR from your LS...

"13. Option package conversions may be performed between specific vehicles of a particular make and model, but only between configurations from within a particular model year. Such conversions must be totally complete and the resultant car must meet all requirements of this section"