me personally i would just buy a garret version
i bought one from http://www.atpturbo.com/ and they offered both anti surge compressor housing and non anti surge compressor housing
they also have more exhaust housing options then HKS have to offer
Garrett T04Z Ball Bearing Turbo
Code: GRT-TBO-055
Turbine Housing options
T4_Divided .70
T4_Divided .84
T4_Divided 1.00
T4_Divided 1.15
T4_Divided 1.32
T4_Divided 1.59
T4_Undivided .61
T4_Undivided .70
T3_T31_4Bolt_63AR
T3_T31_4Bolt_82AR
Turbine
-Wheel: 74.2mm w/ 76 trim
-Divided Housing A/R: .70, .84, 1.00, 1.15, 1.32, 1.59
-Undivided Housing A/R: .61 and .70
Compressor
-Wheel: 84.0mm exd./66.7mm ind w/ 63 trim
-Housing: 0.70 A/R
Dual Ball Bearing Garrett T04Z . 700-750HP flow potential. Compressor wheel diameter is 84mm exd. / 66.7mm ind. (63trim) Compressor housing is .70 A/R has a 4" inlet and 2.5" outlet slip on connection. Flexible range of T4 Turbine housings available in divided and undivided entry, all with standard 3" V-band discharge. Available Divided Housing A/R, .70, .84, 1.00, 1.15, 1.32, 1.59, Undivided .61 and .70 A/R available.
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with that many housing options to pick from im sure there is one there to suit ur needs perfect
http://www.atpturbo.com/Merchant2/merchant...tegory_Code=GTB