BB exhaust tone compared to SB

[johnathan]

I run 40 series flowmasters dual exhaust. The 350 with stock manifolds always had a great aggressive throaty tone. Now the 454 with long tube headers and same exhaust sounds wimpy. Much quieter and less aggressive. I miss that distinct sound

 

[ChrisPerry]

What diameter pipes? You are flowing a lot more exhaust with the 454. It will fill the Flowmasters passages and quiet them down. If you are using 2.5" with a 350 then the 454 will need 3-3.5" to sound as agressive.

 

[johnathan]

2''

 

[ChrisPerry]

Okay 2" is way small for a 454. 2.5" will be louder and give lots of torque or you could put 3" on it and it will be much more aggressive sounding, but may be a bit less torque if the motor is unmodified.

 

[johnathan]

I thought the pipe diameter was bigger than 2'', but I went out and measured when you
asked. I will be pricing some new exhaust this weekend, I may go with different mufflers. I thought I remember reading somewhere that 2.5 was ideal for a BB.

 

[ChrisPerry]

I run 3" dual super 40's on lightly modified 400 (aftermarket heads, RV cam, intake, and long tube headers) and believe me its AGGRESSIVE sounding.

Edit: If it was my truck I would do 2.5" to the mufflers and 3" out the back. 3" is really hard to get routed around the transfer case.

 

[k20]

Im running true dual 3" on my 496, super 44's, into 4x24" tips in front of the tires......that'll get the aggressive tone your after

 

[max 02]

I had a 454 headers 2.5 exhaust and cheep turbo mufflers on my old 78 short box, tail pipes came out behind the rear tires... it sounded sweet.

 

[b454rat]

I have a cheesy vid of my old 84 on youtube. 454 headers, 3" flexpipe to 2 1/2" fake flows with no tailpipes. Anybody that knew anything about cars/motors knew this wasn't a small block.

 

[johnathan]

Thinking of goin with the Summit chambered mufflers, the racing street and strip. Found a few vids with these, but the sound is always crappy. Does anyone run these or know someone who has them?

 

[johnathan]

Ended up going with 2.5 to the muffler 3 out the back. I went the thrush welded chambered mufflers. What a difference, it's sounds bad arse!

 

[kevin400ex]

they have a bunch of these type of clips on their youtube channel

 

[Bowtie85]

Glad ya picked em thrush

I put thrush welded's On the ol mans 77 camper special with a 454, stock other than rv cam. 2.25" from manifolds back. It has one hell of a deep throaty idle, sounds just wicked.

Put the same mufflers on my 383 in my car, sounds bad Azz as well.

They are def a great muffuffler!