does any body know the web site for spin tech? also does any one have a clip of these that i could hear before i order? i plan on running true duals. what is the deal with a cross over pipe or an h pipe? do i have to run one? alos if anyone is a a/c expert read my post that i posted the 31st of this month please i need to know soon.thank u

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1988 firebird formula350tpi msd 6al box blaster 3 coil accel 8.8 wires flowmaster cat back pro shift light a pillar gauge pod and water temp and air/fuel ratio gauges b&m mega console shifter

 

here is the website: http://www.spintechmufflers.com/spin...ntechindex.asp
i am getting them for my 95 caprice police wagon(the muffler should be here by mid-august). I am no expert, i think the purpose of x-pipe or the cross over pipe is to equalized exhaust gas flow(less turbulance). in the world of late(94-96) gm b-body an addition of H-pipe reduce internal drone on the high way for after market cat back system.

dw