Go 12"^^ well I mean if volume isn't an issue? If not then go with 18" even thoigh your Z will still growl but I assume its way less less volume than 12" and of course Non-Resd... GL on deciding buddy either or they're beast xD
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GTM 34 Row Oil Cooler | K&N Drop Ins w/ Z1's Post MAF Tubes | F.I Non-Res'd 2.5" T.P w/ CF CBE | Axis Wheels | Piecing together My Own Custom T4 Top Mount Single Turbo Kit *Still in the works* |
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