exhaust and smog? - Ford Powerstroke Diesel Forum

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post #1 of 19 Old 02-16-2012, 09:52 PM Thread Starter
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exhaust and smog?

I just got my 04 f250 and iv never had a diesel before. Do i have to get it smog because i live in California? can i run just strait pipe? I have like 3inch maybe but it has muffler and cat on it..
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post #2 of 19 Old 02-16-2012, 11:20 PM
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CA smog is for 98+ trucks, they may complain about the cat if they look. Depends on the inspector.

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post #3 of 19 Old 02-17-2012, 05:53 AM
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Or you can do as I did. Basically get a off-road exhaust and then get some 3.5in to 4in adapters, weld them to your cat. Next figure out the length of your cant and adapters and cut that out of the new exhaust. I then used regular exhaust band clamps to hold the makeshift delete pipe in, now when I need my cat in place I just take off the clamps, slip up the cat and tighten it back down. Much easier than having to use and aftermarket delete pipe. I dont see why you couldnt do it with a stock exhaust if you wanted, you just dont need the reducer adapters to put on your cat and you would just need to buy about a 2- 2.5 piece of 3in pipe. I'll try and post some pics up.

2006 F-350 CCSB Lariat
MBRP 4" Exhaust, ARPs, Barder Stage 2 turbo, S&B CAI, TSD SPD, Warren Competition transmission, Edge CTS, Coolant Filter, High Idle Mod, CCV Mod, Zoodad, Newton Leveling kit, Fuel Mavericks 20x9 , Pioneer DVD head-unit, JL Stealthbox and JL Slash 500/1v2 amp
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post #4 of 19 Old 02-17-2012, 09:23 AM
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^^^^What he said. Exactly what I'm doing.

2003 centennial edition f250 4x4 ccsb auto w/blackwater long block w/arp's, 4" exhaust, airaid intake, ODawg's manifold, itp's reg return, sap modified solenoid, DC power 185amp alt, motorcraft 850cca, Warn Hubs, RS 55w 6k hid's, harley headlights, bpd 58v 6 phase, bpd water pump, dieselsite coolant filter, elc coolant, php gryphon, Xcal2 w/unlimited tow, new hfcm, glowshift fuel psi gauge, icon level kit, 20" kmc hoss, 305/55 terra grapplers TOTALED
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post #5 of 19 Old 02-17-2012, 10:14 AM Thread Starter
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Ya I really wanna change out the exhaust just don't want any problems if I could get some pics be great
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post #6 of 19 Old 02-17-2012, 10:17 AM Thread Starter
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So even if I just change the cat out do I need muffler for smog? Not sure if it's different then regular gas trucks
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post #7 of 19 Old 02-17-2012, 10:22 AM
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No the muffler is not part of smaog, its part of the noice abantance laws. Still depends on the inspector because he can fail you for altering the exhaust at all.

In OR we dont do inspections on diesels over 8500 but the law still states you have to have a muffler due to noice restrictions. Its not inforced ver strongle but if you get pulled over for something and the cop wants to be a jerk he can site you for no muffler.

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post #8 of 19 Old 02-17-2012, 10:39 AM
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Here are some pics.







2006 F-350 CCSB Lariat
MBRP 4" Exhaust, ARPs, Barder Stage 2 turbo, S&B CAI, TSD SPD, Warren Competition transmission, Edge CTS, Coolant Filter, High Idle Mod, CCV Mod, Zoodad, Newton Leveling kit, Fuel Mavericks 20x9 , Pioneer DVD head-unit, JL Stealthbox and JL Slash 500/1v2 amp
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post #9 of 19 Old 02-17-2012, 12:10 PM Thread Starter
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This pics are great that's what I'll do!
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post #10 of 19 Old 02-17-2012, 12:11 PM Thread Starter
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What's a pretty decent size to run I don't have anything to super fancy but it's pretty nice.
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