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denali kat pipes on rcsb silverado?

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Old 04-02-2017, 10:14 AM
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Default denali kat pipes on rcsb silverado?

hey every one!

i have a 2004 rcsb 4.8 silverado pretty much stock just a CAI, removed torque management from the trans & efan conversion

a buddy has the kat pipes from a 2005 denali that are dual pipe unlike my stock y pipe 2 into 1, i have a pair of magnaflow mufflers around so i was wondering will the denali kat pipe bolt on my truck and clear every thing? i know i'll have to add hangers just worried about clearance issues?

what i'm looking to do here is a budget true dual exhaust and cut the kats out and replace them with straight pipe. i'm not looking to dump a bunch of money in the exhaust since future plains are a boosted 6.2 swap and these parts are just sitting around
Old 04-02-2017, 01:37 PM
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It should fit fine...the 4.8 and 6.0 are physically the same size and both trucks use a 4l60e....only reason is might not fit is if the Denali is AWD the cat pipes may be routed differently than a 2wd
Old 04-02-2017, 03:08 PM
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Originally Posted by 01FormulaTA
It should fit fine...the 4.8 and 6.0 are physically the same size and both trucks use a 4l60e....only reason is might not fit is if the Denali is AWD the cat pipes may be routed differently than a 2wd
yeah i know they will bolt up to the manifolds just not sure about the pipe routing hate to take every ting off mine to fine out they wont work
Old 04-02-2017, 06:10 PM
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They will, i have them on my 99 just had to remove one of the support brackets from the frame to the trans crossmember mount, and get the trans mounted exhaust mount...only issue i have had is the passenger side hitting the floorboard, but probably has to do with aftermarket replacements.
Old 04-02-2017, 06:48 PM
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Wolftrk99 you have any pics of it installed? i'm clueless on the brackets your talking about

thanks
Old 04-02-2017, 08:16 PM
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I thought i had one in my trans build thread but this was all i could find, i will look on my laptop later..
Old 04-02-2017, 09:14 PM
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cool thanks!

i got two 4" round 14" long so i know i have enough room for them, by that pic i think this can be done fairly easy trucks getting lowered so most likely some turn downs before the axle
Old 04-02-2017, 09:31 PM
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13 in picture above part number is 15860242

When i ordered mine it came with the isolator and the nuts, this assuming you have a 4l60 trans... 4l80 has a different bracket, but sinilar concept as the 6.0/4l80 equippd trucks had the cats behind the crossmember.
Old 04-02-2017, 09:48 PM
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that bracket is $90 online not dropping any coin on that i'll just get creative and make something up or pull one from a junk yard this is not a permanent setup for me since i'm going to turbo the 6.2

since i have most of the stuff sitting around and i get board hopping to get it done for less then $50 in parts (pipes to replace cats, some clamps and universal hangers) then just turn off the rear o2's with my HPT

i keep telling my self just to leave the truck alone and wait till i swap the engine but i like to mod lol
Old 04-02-2017, 10:11 PM
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Its almost an addiction, the engine swap on my 99 turned into mire of a resto mod than i had planned on and still not done, have a bed and backseat full of parts at the moment. I decided to go that route with the exhaist to give me the true duals because if i ever do go FI it will be a supercharger not a turbo...



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