[Doug1]

Bought the Pypes kit SGF15R to clear a DSE Quadra-link on a 2nd Gen Trans Am. Love the fit but the drone is pretty intense at highway speeds. The motor is a 535 making 700+ hp.

Any suggestions? I'm considering the Kindig exhaust cutouts since they will fit nicely at the ends of the x-pype in this car but would need a muffler that isn't so loud to replace the Race Pros without killing performance.

[78w72]

IMO any straight through muffler is going to sound about the same, especially with that much power. the dynomax super turbos are much quieter but probably not the best for performance compared to a straight through muffler.

[Doug1]

Anyone using the Dynomax VT mufflers? They are supposedly "drone free" and have a butterfly valve in them that opens up with exhaust pressure. However, when I went to their site, I didn't see them in their products list. They may have been discontinued.

[78w72]

or try this

http://forums.maxperformanceinc.com/...d.php?t=814315

[78w72]

yes the VT's are no longer available unless you find some used. heard there were too many complaints & problems with the spring loaded flapper rattling.

[BLANK1]

I have the pypes 3" X-pipe kit but I'm using the Jones Max Flow mufflers. No drone and have a great sound. You can get them on ebay for around $40 each. They're straight through and well built for the money. I have the offset/center ones with turn downs after. Part # MF1229

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[Doug1]

Originally Posted by BLANK1

I have the pypes 3" X-pipe kit but I'm using the Jones Max Flow mufflers. No drone and have a great sound. You can get them on ebay for around $40 each. They're straight through and well built for the money. I have the offset/center ones with turn downs after. Part # MF1229

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What made you choose the Jones mufflers? I am beginning to think any straight through muffler will have some amount of drone and that the j-pipe might be the best cure. I wish I could hear different exhausts on a big motor to make a comparison.

[Formulajones]

571 ci full exhaust. Most noise is out back, no drone in the car at all at any speed, and in front of the car all you hear is the fan blade.

Considering the system, it's fairly quiet. Very small straight through mufflers. Case is maybe 12" or 14" long at most?? They were touted as "race mufflers" at the time but I can't remember the brand. The rest of the system is 3 1/2" off the Hooker super comps and into a Dr. Gas X. Then 3" into the mufflers, and 3" Torque Tech tailpipes.

https://youtu.be/DF1y0F-tJ3w

coming home from a local cruise

https://youtu.be/manx_vzRa5c

[OLDFLM72]

Mine (3" RacePros) were too loud for me too Doug... I ended up with Dynomax that I had ceramic coated and LOVE them! Still has that muscle car rumble at idle but not a race car rumble and definitely more "live-able" inside the car while driving!

I wonder if the new Hooker stainless mufflers are straight through like the RacePros/MagnaFlow/Corsa etc?

[Doug1]

Originally Posted by OLDFLM72

Mine (3" RacePros) were too loud for me too Doug... I ended up with Dynomax that I had ceramic coated and LOVE them! Still has that muscle car rumble at idle but not a race car rumble and definitely more "live-able" inside the car while driving!

I wonder if the new Hooker stainless mufflers are straight through like the RacePros/MagnaFlow/Corsa etc?

Which Dynomax did you use?

[BLANK1]

Just thought I would try them out. Read good things about tgem. A lot quieter than I thought. They have a nice deep rumble at idle and a cool racey sound at full throttle.

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[Doug1]

Originally Posted by BLANK1

Just thought I would try them out. Read good things about tgem. A lot quieter than I thought. They have a nice deep rumble at idle and a cool racey sound at full throttle.

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Which ones?

[Hikin Mike]

Originally Posted by BLANK1

Just thought I would try them out. Read good things about tgem. A lot quieter than I thought. They have a nice deep rumble at idle and a cool racey sound at full throttle.

Do you have a video?

[BLANK1]

The Jones MF1229 Max Flow mufflers. They're what's on my car now.

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[78w72]

the jones straight through are the same basic design as the race pros or dynomax ultraflos, they are all straight through perforated pipe with some type of packing in the case, they will sound very similar to each other.

the quieter dynomax mentioned are the "super turbos" which are not straight through & will loose a little power vs straight through.

[70GS455]

Originally Posted by 78w72

the jones straight through are the same basic design as the race pros or dynomax ultraflos, they are all straight through perforated pipe with some type of packing in the case, they will sound very similar to each other.

the quieter dynomax mentioned are the "super turbos" which are not straight through & will loose a little power vs straight through.

A little more info on the dynomax ST. The larger case (5" x 11") 3" mufflers have full diameter 3" tubes inside as opposed to the smaller case (4" x 9") 3" mufflers which neck down to 2.5" tubes inside. Only the side/side ST flow the best. Center/side configuration causes the exh gas to flow around the center tube on the inside at the end, between the roof/floor and tube, as opposed to the side/side with the U flow directors as pictured (no tube in the way). If you go 3", get the longest case 3" that will fit, as the 3" muffler and 3" exh pipes are a good bit louder than an equivalent 2.5" muffler and pipe system.

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[Lee]

Originally Posted by 78w72

the jones straight through are the same basic design as the race pros or dynomax ultraflos, they are all straight through perforated pipe with some type of packing in the case, they will sound very similar to each other.

the quieter dynomax mentioned are the "super turbos" which are not straight through & will loose a little power vs straight through.

I've got RacePros on one car and Borla ProXS on another. Both 14" case 3" I/O straight through designs. They do not sound very similar to each other.

[78w72]

Originally Posted by Lee

I've got RacePros on one car and Borla ProXS on another. Both 14" case 3" I/O straight through designs. They do not sound very similar to each other.

are the 2 cars the same engine & exhaust system? probably not, even identical mufflers will sound different on 2 different cars...

but it was a general comment to the design of the mufflers, i have the race pros & have heard the ultraflo's on another similar engine build car & they sound very similar but of course not exactly alike.

[Lee]

Originally Posted by 78w72

are the 2 cars the same engine & exhaust system? probably not, even identical mufflers will sound different on 2 different cars...

but it was a general comment to the design of the mufflers, i have the race pros & have heard the ultraflo's on another similar engine build car & they sound very similar but of course not exactly alike.

I have the RacePros on one car (Cutlass) with first a 320rwhp 455 Olds, and now with a 400rwhp 6.0 LS. They sound pretty much the same with either motor.

[BLANK1]

Have a video on youtube. It's under Jones Max Flow mufflers.

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