550-600 is right around where you want to start considering a girdle. there are a lot of guys who run them very successfully and there are the naysayers who say you don't need one.

think of them as insurance. if you needed one and don't have one your outta luck. but if you didn't need one and you used what are you out?

yes we sell girdles. we have a lot of very happy users with our girdle kits. yes the first basic upgrade would be a set of aluminum main caps and some arp studs. after that a girdle.

check them out at bcrproducts.com then make your decision.