Alright, I want something loud. Not rice loud, American Domestic sounding loud. Whats the best muffler to get installed, already went with Dynomax ceramic coated headers with 1 5/8 in. primaries, 3 in. out.

 

And I don't want a name, I am looking for series and type to get, I'm already aware of some of the best.

 

Flowmaster American Thunder are pretty loud. My friend has them on his '89 IROC 350. They sound really hollow (gutted cat though) and they crackle/pop a lot. If you really wan't loud go with no muffler

 

Or get a spintech

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'82 Z28
LG4 305 .030 over, performer intake, holley street avenger 670, xe 256 cam, tes headers, 3 inch single exhaust, spintech muffler, 14 x 3 inch drop base k&n.

 

Straight pipes, no cats. Or no cats and *insert your favorite muffler here*. Also, a cat with no muffler sounds pretty tough, IMO. Flowmaster 80 series is probably your best bet for a loud F-body muffler.

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1990 IROC 350
Mods: Too busy trying to make it run right to mod it.
Airfoil, Dynomax cat-back, MSD coil, 180 t-stat, Bald Eagle tires,
Hypertech fan switch, Accel 23# injectors, Holley AFPR, ported plenum,
Ported Daytona Yellow stock base, Moroso valve covers, other stuff,
Ruger P95DC, hot wife, new oil filter, thick rubber floormats, no cats.
18.0 @ 85MPH since I'm one big-a$$ MF
"It's better to have and not need than to need and not have."

 

Anyone know what decibal levels these hit?

 

go with a high flow cat with 3" connecting pipe into flowmaster 40 series. it will be loud. not the loudest, but it will sound awesome.

 

un4givin,
are the dynomax headers u described a 3 inch collector?...also do they come w/a 3inch y-pipe?...if u don't mind me asking where did u get them and how much?...thanks a lot

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91 Pontiac Firebird...305 TBI
black, t-tops, auto
K&N 14x3 open element flat base air cleaner, 3 inch high flow cat, 3 cat-back into a flowmaster 80 series, IAT Resistor, ultimate TBI mods, 160 stat Hypertech Thermomaster Chip, TC lock-up switch, SLP Torsen Posi w/Richmond 3.73's, removed rear seats, Spohn LCA relocation brackets...SOON TO COME...headers and y-pipe, Nitto Extreme Drag Radials, LT1 Cam, Edelbrock Performer manifold

 

i was going to go with Borla for my car *putting in a 406* but after reviewing the flow #'s with Borla, Flowmaster and Dynomax and all the others.. Borlas were just BARELY better then flowmasters. so im going to just go with a new 40 Series muffler for less then $100 vs Borla's for $525 *jegs/summit* i know u dont care about flow #'s.. but im just trying to save u a few $$.. as far as loud.. with my 40 series flowmasters now.. its loud... the only louder i have heard is with a straight pipe and no muffler or just open headers *saw some flames too *

 

Maybe I'll ditch the muffler, go str8 from the headers back