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06GMCLBZDMAX 07-15-2006, 04:24 PM I'm looking to get an MBRP 5" Cat back for my 06 LBZ. Anyone have this? I am not adding a tuner until truck breaks in a little more. 900 mi now. Will I get some smoke....I am auto trans.? MBRP says you may not be able to put spare tire back on. Is that true with anyone here? Riccas 07-15-2006, 04:39 PM I have the complete 5" turbo back system. Spare tire fits. Definately spend the extra cash to get a full system. you will thank me. Make sure to look into blocker plate and finger stick as well. I noticed a major difference after exaust and a difference after the plate also. Pics in my garage 06GMCLBZDMAX 07-15-2006, 05:16 PM I wonder if shortbed/long bed makes a difference in whether or not the spare tire fits. I have short bed. WHISTLER06 07-16-2006, 07:12 PM I wonder if shortbed/long bed makes a difference in whether or not the spare tire fits. I have short bed.i have a x-tend cab short bed with the 5 " and it fits:ro) jmac660 07-16-2006, 10:30 PM I added the 5" cat back and love it, not too loud with a nice rumble. | ||