Its not a hard install but first you must determine if the CAT is not clogged (a common problem) If it is you'll need a new CAT to replace it. If you need to retain the stock look for your area (and the case is good), then just hollow out/gut the existing cat with a long lug wrench or tire iron. This saves a lot of money and keeps the bureaucrats happy.
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" THE BLACK PARALYZER" -87GT 3800SC Series III engine, custom ZZP /Frozen Boost Intercooler setup, 3.4" Pulley, Northstar TB, LS1 MAF, 3" Spintech/Hedman Exhaust, P-log Manifold, Autolite 104's, MSD wires, Custom CAI, 4T65eHD w. custom axles, Champion Radiator, S10 Brake Booster, HP Tuners VCM Suite.
"THE COLUSSUS" 87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H
" ON THE LOOSE WITHOUT THE JUICE " [This message has been edited by Dennis LaGrua (edited 10-20-2019).]