Is this the correct DP clamp? - Chevy and GMC Duramax Diesel Forum
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Old 10-27-2012, 03:32 PM   eBay Motors  #1 (permalink)
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Is this the correct DP clamp?

Im most likely going to need a new V band clamp to connect the new exhaust to the stock downpipe. Ive looked a little and only found this one on AlligatorPerformance, just wondering if its the correct one Ill need. 3" V-Band Exhaust Clamp
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Old 10-27-2012, 03:35 PM   eBay Motors  #2 (permalink)
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Most aftermarket DP's are 3 inch so yes thats the correct one your looking for.

Last edited by DMaxxrus; 10-27-2012 at 03:38 PM.
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Old 10-27-2012, 05:38 PM   eBay Motors  #3 (permalink)
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Its a stock downpipe, but Im sure its the same thing, thanks
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Old 10-27-2012, 05:43 PM   eBay Motors  #4 (permalink)
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Just go to the dealer. Most of them have it in stock...that way you dont have to wait.
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Old 11-13-2012, 09:53 AM   eBay Motors  #5 (permalink)
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Well I got the 3" clamp from Alligator today, isnt the correct one. I took it to the flange on the new exhaust and its too small, so, I must need the 4" clamp?
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04.5 4x4 ~133k miles
DE 4", 5100s, LBZ MP, S&B LBZ air, KoryWillis Go-go Juice, Insight CTS, ADII, 8' Fisher



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Old 11-13-2012, 05:59 PM   eBay Motors  #6 (permalink)
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I've got a 5" MBRP turbo back system on my truck. I have since changed downpipes, but when I first got the system it bolted right up to the stock downpipe. The front pipe on my exhuast is actually 4" then switches to 5" further back. I'm kinda confused why the stock clamp wont work.
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2005 LLY GMC 2500 ecsb 4x4
FPE billet S363/73 turbo HX 40 downpipe
Grade c head gaskets w ARP studs
All Season EGR delete Y bridge. ASD intercooler pipes
PCV re-route. LBZ mp. Nicktane Cat filter adapter
S&B dry filter cai. 5" MBRP dp back exhaust
Pillar gauges and Edge CTS.
EFI Live by Kory Willis, thanks to Willie at
Synthetic Motorsports.
Stock trans for now.
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Old 11-13-2012, 07:59 PM   eBay Motors  #7 (permalink)
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I havent tried the stock clamp, havent taken the stock exhaust off yet. I had asked here if the 3" was correct, then ordered it from Alligator. Got it today, its not the correct one. A tech from Alligator called me today and said that it needs a 3.5" clamp and that its usually a dealer part, so Im gonna pick one up tomorrow.
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04.5 4x4 ~133k miles
DE 4", 5100s, LBZ MP, S&B LBZ air, KoryWillis Go-go Juice, Insight CTS, ADII, 8' Fisher



Dirtymax this, Dirtymax that...
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Old 11-14-2012, 04:46 AM   eBay Motors  #8 (permalink)
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Thats what I was thinking. I believe its 3" pipe but the flange is a tad bigger. I was able to soak mine with PB Blaster overnight, remove it, and reuse it with no leaks. Just my.02
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2005 LLY GMC 2500 ecsb 4x4
FPE billet S363/73 turbo HX 40 downpipe
Grade c head gaskets w ARP studs
All Season EGR delete Y bridge. ASD intercooler pipes
PCV re-route. LBZ mp. Nicktane Cat filter adapter
S&B dry filter cai. 5" MBRP dp back exhaust
Pillar gauges and Edge CTS.
EFI Live by Kory Willis, thanks to Willie at
Synthetic Motorsports.
Stock trans for now.
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Old 11-14-2012, 07:38 AM   eBay Motors  #9 (permalink)
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Yah, Ive sprayed it with PB already in preparation. There's always something that needs replacing or something that gives me a hard time when I work on the vehicles. That clamp is the only thing not supplied w/ the new exhaust, and the stock clamp is rusty so I figure I might as well be prepared. Hopefully I'll have time on Friday to make the switch. Atleast when Im at the stealership I can get some Top end cleaner to do the injectors too at some point.
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04.5 4x4 ~133k miles
DE 4", 5100s, LBZ MP, S&B LBZ air, KoryWillis Go-go Juice, Insight CTS, ADII, 8' Fisher



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Old 11-14-2012, 08:15 AM   eBay Motors  #10 (permalink)
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damn. wish i saw this thread before today.

But yeah, larger clamp is needed
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