Garrett GT28R. The 530bb were just perfect for street/daily use and the power from them was awesome BUT for $2600-2900 a pair, they were expensive considering you can get a bigger turbo for a lot less $$$$. There was absolutely no lag. The GT28R offers more power but has a little lag and is almost $600-900 cheaper than the 530bb while still being very streetable. Either product is great in my opinion but why not save $800 and get more power with the GT28R? Hopefully this helped you out. :P
****472 RWHP/461 TORQUE ON 110 RACE GAS @21 PSI ****438 RWHP ON 93 OCTANE PUMP GAS/STOCK MOTOR**** ****429 FT LBS/TQ*******************************