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Discussion Starter · #1 ·
First off, i already took off my muffler and cat on my 06 LBZ but i was wondering if there were any companies that sold 4" or preferably 5" exhaust from the turbo back for my truck? And if there is really and gains from going that big?
 

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Since you have removed the muffler and cat you will not see much if any performance difference by going to an aftermarket 4" system. You can however get the same or slightly better performance and lower the noise level back to near stock if that's what your looking for. The 5" doesn't buy you any performance on the street.
 

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Discussion Starter · #3 ·
No i like the sound loud. I like the new diesels how you really hear the turbo whistle loud and when u get to about 3000rpm you hear the loud rumble. I want my truck to be loud.....loud as hell haha:ro)
 

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MBRP is releasing a 5" Aluminized system either front pipe back or cat back.
But unless your pushing some really high hp numbers you wont see any real performance benefits except for a deep rumbling sound. :)
 

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Discussion Starter · #5 ·
Do you know where i can get that at? i cant find it anywhere??
 

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Did you pull any codes when you took the cat off? If so how did you erase them?
 
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