what do i need to do this???? and how is it done???? thanks....

 

a hammer and a long bar or rod

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86 IROCZ
T-Tops
700R4
305 TPI
3.23 gears
shift kit, manual TC switch, manual fan switch, flowmaster exhaust with edelbrock TES headers& hollow cat, gutted MAF.

 

just bash out whats inside of it??

 

You just need to do exactly that, bash out what is inside the cat. You can use anything even a long screwdriver. However, you will have a little dificulty when it comes to the AIR tube that is inside the cat. It runs right through the middle. You just need to try and break it off on the wall on the inside where it comes in. It'll take some time, just use a screwdriver or something with a fairly sharp edge. It's also a good idea to crimp the end where the AIR pipe comes out of the cat and not attach it to the one going back up to the engine, cause exhaust can leak back up. I just crimped it and put a dab of high temp silicone on the end to make sure it closed. Most people seem to try and put a pipe through the cat when it is done. I have recently tried this but my pipe didn't fit. Hopefully you won't have this trouble. Good luck.

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87 GTA 350 L98
K&N filters, beefed up TH-700r4, Accel Manifold, Ported Plenum and Runners, Fuel Press. Regulator 49.5psi, air foil, modified MAF, SLP cold air box, Hypertech Thermomaster chip w/160 thermostat, MSD 6AL and Blaster 3, B&M shift kit & megashifter, Moser Ford 9in Rear with Richmond 3.50 and locker, Edlebrock TES headers and Cat Back,Hotchkis setup in rear, Poly suspension and Koni in the front, relocated MAT, bypassed TB coolant, 300 lbs lighter

Fastest ET's
Stock-0-60 6.8, 1/4 15.0 @ 94
Best-0-60 4.7, 1/4 12.8 @ 112
Norm-0-60 5.2, 1/4 13.2 @ 108