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Old 09-09-2009, 08:58 PM   #1
402BigBlockSUB
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Exhaust help need opinions

Have an 85 Silverado 4X4 need some opinions on how to run my exhaust. It has passed inspection so i got my tags and I wanna run a nice exhaust. I have 50 flowmasters on a 1972 suburban and that isn't what I want for this truck. Duals? Mufflers? Pipe Size? CATS? Where to dump the exhust? Tips?

I want it loud with a deep tone but nothing too obnoxious or a loud resonate in the cab

Heres a pic of the truck
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Last edited by 402BigBlockSUB; 09-09-2009 at 08:59 PM.
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Old 09-09-2009, 09:03 PM   #2
3r!c84
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Re: Exhaust help need opinions

hey nice truck.
i got 2 40s on mine and it is a little loud but thats what i wanted.
no cats and its 2.5in pipe from the manifolds.no cats and dumps right befor the rearend...but i dont have to pass any thing here in Florida..
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Old 09-09-2009, 10:07 PM   #3
402BigBlockSUB
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Re: Exhaust help need opinions

Ok thats kinda where i was heading. Do your 40s pop or crack? And just wondering with the downward dumps whats the sound like with it being under the bed? What do u think of 45 degrees behind the wheels but kind dumped down out of sight?
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Old 09-09-2009, 10:13 PM   #4
flamingbig10
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Re: Exhaust help need opinions

double post
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1980 c-10 short bed lowered, cammed 6.0, 4l80e 3600 stall, smp tune, wilwoods, and flames best time so far best et 7.86 @87 on motor 7.57 90 on a 75 shot
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Old 09-09-2009, 10:22 PM   #5
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Re: Exhaust help need opinions

this is my old setup with 2 40s running through long tube headers and ends over the axle it wasn't to loud with and had a good tone
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1980 c-10 short bed lowered, cammed 6.0, 4l80e 3600 stall, smp tune, wilwoods, and flames best time so far best et 7.86 @87 on motor 7.57 90 on a 75 shot
Build http://67-72chevytrucks.com/vboard/s...d.php?t=283326

Last edited by flamingbig10; 09-09-2009 at 10:24 PM.
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Old 09-09-2009, 10:42 PM   #6
Scootin 81 C20
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Re: Exhaust help need opinions

If you want a nice, deep, idle tone, run this.

This is what I have:
Stock manifolds
2.25" from manifolds to mufflers
18" Long Cherry Bomb Glasspacks
2" Tailpipes ran straight out the back

I have a video of it somewhere. I'll find it and post it for ya.
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Last edited by Scootin 81 C20; 09-09-2009 at 10:43 PM.
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Old 09-10-2009, 06:28 AM   #7
3r!c84
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Re: Exhaust help need opinions

Quote:
Originally Posted by 402BigBlockSUB View Post
Ok thats kinda where i was heading. Do your 40s pop or crack? And just wondering with the downward dumps whats the sound like with it being under the bed? What do u think of 45 degrees behind the wheels but kind dumped down out of sight?
no poping or crack
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Old 09-10-2009, 08:43 AM   #8
85Bowtie
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Re: Exhaust help need opinions

I would say Super 40's but they do have some interior drone. You can go to the flowmaster website or any others and check out what they sound like.

http://www.flowmastermufflers.com/.
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Old 09-10-2009, 09:13 AM   #9
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Re: Exhaust help need opinions

I like the Magnaflows I have. They sound awesome at idle and there is no resonance whatsoever in the cab.
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