So went up the past 2 days for a drive. Back end keeps breaking loose to much for me. Tried loosening the rear struts. Still didn't help. I am about to switch tires to Dunlop D1 Star Specs. Here is a list of what I have done. Any advice on what to go with next. I know a bigger front sway is in the works also. Engine: XS Power Catless 3" Downpipe Invidia G200 Catback Turbo XS Uppipe Cobb Accessport V2 Stage 2 Suspension: Racecomp Engineering Wagon Springs Cobb Front/Rear Sway Bars Cobb Rear end links Hotchkis Front end links Whiteline Rear strut tower bar Koni Yellow inserts SPT H-brace 04-07 rear top hats IXIZ Stage2 Shortshifter Wheels and Brakes: 5zigen Pro Racer GN+ Forged 17x7.5 Cooper Zeon 2xs tires (I drive 35k -40k a year) Power Slot Rotors F/R Stainless Brake line Hawk HP+ Front Hawk HPS Rear
I would add more camber both front and rear, with Neovas I found that they react well to 2.8 front and 1.6-1.8 rear
I'm no racer but I'd say at more camber all around like Matt says. Can you loosen your rear sway bar to a lower setting?
I run full negative front and -1.5 rear. What's your air pressure? You may need to go back to a stock rear sway or maybe just stock rear endlinks. You could be lifting the rear inside tire... and then sliding. Bumpy/banked turns and stiff sways are awkward. Wheel droop and good tires are really helpful.
He should have plenty of droop travel and the sways should be okay, the rear camber curve on Subarus isn't that bad. .9 is not much camber even on a street tire, I would say camber first and try and keep your hot tire pressure around 38-42