How do you hollow out a Cat??
Thread Starter
Supreme Member
Joined: Jan 2001
Posts: 7,164
Likes: 1
From: Someone owes me 10,000 posts
Car: 99 Formula
Engine: LS1
Transmission: T56
Axle/Gears: 342
How do you hollow out a Cat??
I need to go thru emissions soon and will hopefully be putting on my 3" catback tomorrow. I was told that junkyards are not allowed to sell cats. My brother knows a guy that owns an exhaust shop and I was told he had a bunch of cats laying around. My brother is close with this guy and I am pretty sure he would sell me one of the cats. Now my question is the cat if I can get one will be most likely used and not a high flow one. So how do I go about hollowing it out?
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'86 IROC
T-TOPS, TINTED WINDOWS, BRAKE LIGHT BLACKOUTS
GM GOODWRENCH 350
EDELBROCK TES HEADERS
FLOWMASTER, NO CAT
EDELBROCK 600CFM CARB.
KN AIRFILTER
ACCEL HEI DISTRIBUTOR
160* Stat
3:73 Posi
Rebuilt 700R4 vette servo and .500 boost valve
B&M Megashifter, 5" Autometer Tach w/shift lite
Soon to be installed
3" Hooker Aero Chamber
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'86 IROC
T-TOPS, TINTED WINDOWS, BRAKE LIGHT BLACKOUTS
GM GOODWRENCH 350
EDELBROCK TES HEADERS
FLOWMASTER, NO CAT
EDELBROCK 600CFM CARB.
KN AIRFILTER
ACCEL HEI DISTRIBUTOR
160* Stat
3:73 Posi
Rebuilt 700R4 vette servo and .500 boost valve
B&M Megashifter, 5" Autometer Tach w/shift lite
Soon to be installed
3" Hooker Aero Chamber
Senior Member
Joined: Oct 1999
Posts: 786
Likes: 1
From: Austin, Tx
Car: 92 Formula
Engine: L98
Transmission: A4
well,
on my 'maro, I just took a screwdriver, and a wet/dry shop vac to mine and beat the crap out of the inside. On the inside (if you dont know) there is a honeycomb looking grid of material. It is very easy to knock out. Just go for it.
The bird has no cat. Aint that convenient?
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http://kiztope.50megs.com
92 Pontiac Firebird Formula 5.7/A4
K&N, nothing else yet!
92 Rs 3.1/T-5
Beautiful car, several mods, but now I am turning attention to the 'bird!
AIM : Theonekiztope
ICQ: 8787542
"Maybe one day life will take a turn. When it does Lean into it!" Leon Calrinsky (98)
on my 'maro, I just took a screwdriver, and a wet/dry shop vac to mine and beat the crap out of the inside. On the inside (if you dont know) there is a honeycomb looking grid of material. It is very easy to knock out. Just go for it.
The bird has no cat. Aint that convenient?
------------------
http://kiztope.50megs.com
92 Pontiac Firebird Formula 5.7/A4
K&N, nothing else yet!
92 Rs 3.1/T-5
Beautiful car, several mods, but now I am turning attention to the 'bird!
AIM : Theonekiztope
ICQ: 8787542
"Maybe one day life will take a turn. When it does Lean into it!" Leon Calrinsky (98)
Moderator
Joined: Apr 2001
Posts: 1,408
Likes: 1
From: Bayville NJ and Newark at NJIT.
<font face="Verdana, Arial" size="2">Originally posted by 92RSCAMARO:
lol...yeah I had a friend pound the **** out of the inside of my cat with a screwdriver...while I sat inside the car and revved the bitch to 4500 to blow out the chunks.
</font>
lol...yeah I had a friend pound the **** out of the inside of my cat with a screwdriver...while I sat inside the car and revved the bitch to 4500 to blow out the chunks.
</font>
Supreme Member
Joined: Jul 1999
Posts: 4,310
Likes: 1
get the ceramic stuff out, have the exaust shop guy cut the ends off, run a pipe straight through the cat, weld it together to look like a real one.
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-Tas
'89 Formula WS-6
305, TBI, auto, 14x3 chrome flat based open element with K&N, Milodon 160* thermo, functional Formula hood, cross-flow Flowmaster, '99z28 rear pipes and tips....
To be installed eventually far far far into the future: Yours if the price is right and I don't have to ship
:
Hooker 1-5/8" 50 state legal headers, Dynomax 3" I pipe (PN 44063 and 43248), Catco 3" cat, and injector spacer.
Super GRK_Taz World
F-Body Dual Exaust
EFI & Intake Options
AOL IM: superGRtaz
------------------
-Tas
'89 Formula WS-6
305, TBI, auto, 14x3 chrome flat based open element with K&N, Milodon 160* thermo, functional Formula hood, cross-flow Flowmaster, '99z28 rear pipes and tips....
To be installed eventually far far far into the future: Yours if the price is right and I don't have to ship
:Hooker 1-5/8" 50 state legal headers, Dynomax 3" I pipe (PN 44063 and 43248), Catco 3" cat, and injector spacer.
Super GRK_Taz World
F-Body Dual Exaust
EFI & Intake Options
AOL IM: superGRtaz
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