But for further confirmation, i suggest u should go check with puspakom of JPJ officer first because if you can get legal statement from them that bolt on turbo on non-turbo engine does not need inspection, then it should be ok lor..
But for my experience, two of my friend:
1. Wira 1.5 (original Proton Engine) bolt on turbo + big inter cooler, got roadblock by police only, easily pass without further question.
2. Kelisa 1.0 (original Perodua Eninge) bolt on turbo + big inter cooler, got roadblock by JPJ, been asking by the JPJ Officer whether he change the engine or bolt on turbo, my friend simply open the bonet and show the JPJ officer his engine is bolt on turbo, then kawtim, no further question / explanation, the officer just let him pass.
Both situation is no further question / explanation by by both officer (JPJ and Police) , so still don't have legal statement regarding bolt on turbo cases. Hope anyone can add some more experience..:proud: