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Hey guys i have a 2006 LLY and i just had a tts 4 inch cat back installed on it the other day. I really like the system , but i wanted alittle more nosie so i had my buddy take the muffler off and put a 4 inch peace in. The truck sounds much better ,and feel's to have a lot more power, but i seem to have turbo lag. I find this weird because before i had this system installed i had the stock exhaust and had the muffler taken out and it seemed to make the lag go away. So i was woundering could this be because the exhaust is more free flowing but the engine can only bring in some much air , where before with the stock exhaust it was alittle more restricted. Any input's thanks
 
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