I would invest the $$ in decent tyres rather than an LSD, unless your well over 300wkws. My G6 runs good, fast laps at wakefield and Marulan, mid 12s at wsid without traction issues if driven smartly, giving it easy throttle inputs in 1st & 2nd. The FG has the luxury of being able to fit wide 295 tyres in the rear without touching the guards, or 305s with rolling the guards. I've been actually supprised with how much grip mine has with 295 and the stock open diff... its done 20oookays now and is still very tight, leaves two fat black lines when you get excited If your only running around 300wkws, just get some decent tyres.