okay, the tes headers for 90-92 dual cats is **** and doesnt ocme w/a ypipe. had i known this, i would have gotten the single cat and just converted over. anyway, the exhaust shop made a ****ty y pipe, its like bent every 3" to mold to my body underneath and is about 2 1/4 inches wide. this may be my problem with my mph. i have the dual cat headers so can i just order a y pipe from edelbrock and will it bolt on? will i lose power going from 2 cats to 1 cat? or should i get a nice built y pipe with 2 cats that is about 3".

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1990 G92 5spd LB9 - 3.42 80,000 miles

Accel Ignition/Wires (8.8mm), Advanced Timing, TB Bypass, Ported and Gasket Matched Plenum, Synthetic Motor Oil, 160 Thermo, TPIS Airfoil, K&N Air Filters, Centerforce I Pressure Plate and Clutch, Edelbrock TES Headers, Dual Cats, Edelbrock RPM Series Catback, Homemade Ram Air, Bosch +4 Platinum Plugs

14.4 @ 94mph w/2.0622 60ft (w/o headers and catback)

14.426 @ 96.19mph w/2.167 60ft(w/headers and catback)