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Reply With QuoteYou will be better off just running cats, especially if michigan runs emmission testing. Your motor will run better as its designed to with them.
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This is a discussion on is this really worth the possible ticket? within the Exhaust forums, part of the Performance category; so ive just put a new 350 vortec in my silvy and now when im driving it im getting horrible ...
is this really worth the possible ticket?
so ive just put a new 350 vortec in my silvy and now when im driving it im getting horrible mileage. i know the 33's dont help but i think i should get better than 10 miles 2 the gallon. i took it in they said the cats are plugged so i was thinkin about runnin offroad y-pipes but was wondering if it is worht it for milage etc.. i will tune out the rear o2s if i do this but was wondering if it would be better to just replace the cats instead.
Beef under muh truck.
You will be better off just running cats, especially if michigan runs emmission testing. Your motor will run better as its designed to with them.
2006 Tahoe Z71
I like the offroad y pipe
just gut the cats and run o2 simulaters in the rear ones
if your environmental friendly get new cats, if not get rid of them.
O2 GMC RCSB 4.8L V8 AUTO 3.73's
rebuilt/beefed up 4L60E(at 43,000miles)
Matching Ninja 500r
Michigan will let you drive just about anything on the road. I would hollow out the cats and then get the O2 simulators.
1999 2 Door Tahoe 4x4 w/ 14 Bolt SF & TruTrac. Corvette servo, Gibson cat-back, custom tune from Black Bear, AD244 alt. upgrade, Z71 skid plates, Escalade cluster, 2" block + 1.5" crank, 285/75R16 SOLD 1/2012
2008 Silverado 1500 Z71, Borla catback, block and coil spacer
Hollow them beaches out!
Sold-->New Truck -->
I am a GMC Man Now!
clogged cats will destroy your engine fast, and with very little warning, hollow them out, depending on where you are you may still pass with a visual inspection.
no testing in michigan, nothing on the horizon either
ASE Master Certified Technician
2000 Silverado 6.0 4L80E 2wd
*RIP*1994 Z71 SCLB 355, Dart Heads, 10.5:1 CR, PM rods, CC XR270HR
We don't have testing in MN, but I still put a high performance cat on my 91. It's acts as a "little muffler" on my truck.
-1953 3100-
Like dave89iroc said, no testing in Michigan. If you can do the cat. delete option yourself, I would do it. You will have to pay an exhaust shop under the table to do it. They get a $10,000 (or $5000?) fine if caught.
1979 Chevy K20 - 400ci, TH400, 10B, 14BFF, 98k miles
1985 Monte Carlo SS - Restification underway
$5k per offense IIRCOriginally Posted by B'05G'79
ASE Master Certified Technician
2000 Silverado 6.0 4L80E 2wd
*RIP*1994 Z71 SCLB 355, Dart Heads, 10.5:1 CR, PM rods, CC XR270HR
The shop? Or anyone caught without a cat?
No cats equals smelly truck.
peace
PAuly
97 GMC 2wd RCSB 5.7, s10 2700 footstall, Hooker 24621hkr LT's , 2.5" cats dual 4"pipes exit B4 pass. side tire, custom driveshaft 3.42 G80 FIPK MAF descreen GM/Mercruiser Marine intake manifold 29lb LS2(EV6) injectors Ed Wright PCM(best mod), LT4 KM 14.8@94mph 2.007 4000lbs 122mph
the shop
I have never heard of an owner being caught in michigan, local and state cops never look
none of my built trucks have cats
Last edited by dave89iroc; 05-24-2008 at 07:50 AM.
ASE Master Certified Technician
2000 Silverado 6.0 4L80E 2wd
*RIP*1994 Z71 SCLB 355, Dart Heads, 10.5:1 CR, PM rods, CC XR270HR
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