So good once it was in the sound was completely different far louder and much more aggressive the Engine response is remarkable The J’s pipe went in first time it fitted perfectly. no other modifications were needed. We were waiting for the “get a hammer a grinder and the welder” moment but it never came Also it does burnouts now Both wheels smoke, it’s a sight to behold I need some skid rims now I don’t want to destroy my RE003’s early