| For an HKS 2530 which used a Garrett GTBB cartridge you have to buy a new center cartridge. BB turbos aren't rebuildable, although Garrett has recently introduced a cartridge exchange program that can save some money. You can use an Garrett GT2860RS center cart and just change the compressor wheels with your exiting ones as long as they aren't damaged. We keep those center carts new here in stock.
Russell Floyd Z1 Motorsports www.300zx.com 1990+ Nissan Z specialists Used Parts, New parts, Service/Repair and Performance Z1 Motorsports Exclusive Parts Line 2877 Carrollton Villa Rica Hwy Carrollton, Ga 30116 770-838-7777 770-832-9253 (fax) 
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