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Old 02-19-2012, 08:41 PM
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Aftermarket Exhaust Kits

First off, I know there are a TON of exhaust kits for these trucks, but here's my question for those of you who are required to run cats (not the feline ) in your state.

Is there a bolt on kit out there you recommend that allows you to swap out a straight-pipe and a cat during your smog test? I want to straight pipe my truck, but state law requires visual inspection for pass so I need something thats a bolt-on.

My other question are you able to use a cat with the 3" DP that MBRP sells? I have seen on their website that will not work?? Temporary only ofcourse.
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Old 02-19-2012, 09:14 PM
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The Diamond Eye kits allow you to bolt the cat back up. Their downpipes have a ball flange on the end. I have only installed exhaust on two trucks, both Diamond Eye, I just cut right in front of the cat to keep the female part of the flange, and bolted the rest up to create a straight pipe. I bet you could get a cat delete pipe when you want a straight pipe and take it out and install your cat to make it look good for inspection.
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Old 02-20-2012, 08:28 AM
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Exactly what I was looking for thank you! Is the Diamond Eye DP same basic idea as MBRP? ....no real edge one over the other?
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Old 02-20-2012, 12:51 PM
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I can't say for sure, it fits really good and have had no issues so far. If I buy exhaust for any other truck it will most likely be Diamond Eye. The only thing that I don't like about Diamond Eye, don't know if any others have them, but I wish that they had band clamps instead of the u-bolt type(not sure exactly what they are called).
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Old 02-20-2012, 01:17 PM
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supposedly the mbrp does in a lil easier, i did a diamond eye and had to hit the firewall a bit to fit, but they are both 3" for the most part
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Old 02-20-2012, 04:29 PM
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Quote:
Originally Posted by 351fifty View Post
supposedly the mbrp does in a lil easier, i did a diamond eye and had to hit the firewall a bit to fit, but they are both 3" for the most part
I just used a big prybar that we have and pryed against the pinch weld. It took me longer to get the old dp out than to put the new ones in. I think they go in easy and fit well. That's just my experience though.
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Old 02-20-2012, 10:02 PM
Can you hear the derail??

 

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yeah same here on removal and install lol
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