YUP

 

I just put on the magnaflow SI/DO and its the bomb, it sounds so good and gained some performance But the nice tone will put a huge smile on your face that takes time to wipe off. Much better sounding than my friends f-150 with the flowmaster, to much drone in the cab at higway speeds... Go magna flow and never look back.

 

When will people please erase backpressure from their vocabulary? The only thing that matters with exhaust is keeping the speed of the exhaust high. Too many bends = lower performance. Crush bends = lower performance. Large pipe diameter with the same mass flow rate = slower exhaust = lower performance. We can theorize all day long, but chassis dynomometers have proven how crappy Flowmaster mufflers and systems perform relative to their aftermarket competitors.

Chose Flowmaster if you know what it sounds like and can't live without it. Otherwise, a Magnaflow system will kick its butt in performance.

 

i had otherwisae proven to me the day my truck was dynod guy with a drag truck did a pull with some super 40's then unbolted them and did a pull with magnaflows. he lost 15lbs torque but gained 12 hp. the power curve didnt start till later on as well with the magnaflows

 

i jsut had a stupid ? for you guys,... everyone talks about drone on the highway... i dont know who far you guys drive or anything so take that in to consideration but i do about 100 miles maybe more a day and well i put duals on my truck so that i could hear them! i know the low drown isnt like a heart throbbing beat or anything but hey i still want to kno that people behind me can hear me

 

Faster150, that's great information for that other guy, but we don't have drag trucks.

 

AMEN BROTHER!!!!!!!!!

 

it was just my point magnaflow helps ur top end not ur low end... flowmaster helps ur low end not ur top end. so its all preference to sound and where u want ur power... performance or towing power...

 

I think the point APT was trying to make is that a "drag truck" and a stock or mildly modded truck will not respond to exhaust modifications the same way.

 

the truck was a 454 with a cam and long tubes. not a fully blown nitrous injected or anything. he actually threw a belt on the dyno. and only put down about 365rwhp.... according to this dyno... but it also said a supra put down 385rwhp at 22PSI on 116 octane.... so i dont trust it.. i had mine dyno'd and numbers were drastically low. even the guys running it said their dyno was off about about 15-20 % but they couldnt adjust it there on site... so they closed it down after my pull. and i was 38th that day

 

So, you are basing all your recomendations on one screwed up dynamometer?

I have yet to hear of a Flowmaster muffler or system outperform a straight through design, such as Borla or Magnaflow. Your account was the first, but I have to discredit it.

 

A screwed up dyno and a truck with long tube headers.

Magnaflow and Troyer have dyno tests that show you will not lose bottom end with Magnaflow catback (15609, 15749) for "our" trucks. Who gives a rat's *** about a modified drag truck.

 

Hi.

My vote's with Norm and APT. Could not have said it better, guys.

And I also agree: that most ludicrous of fiction called BACKPRESSURE be banned from this forum! Read my lips: it's Sustainable Exhaust Gas Velocity that is the holy grail of system design! Maggies have it; Blows don't... and they, well, just plain blow ( or suck, whichever you prefer ;-))

It's pretty much a given that MT has earned our trust, and he recommends what I bought.

For *our* real-world trucks, it's Magnaflow for real-world results.

I still cannot believe, despite ALL the overwhelming facts, endorsements and posts, that people continue to waste money on BlowMasters, then rave about the sound ( but not about the loss of torque ). Too embarrassed to admit, perhaps, because they didn't do the research, and effed up? S'okay - you are after all only human, and we all make mistakes!

Even if they did sound better ( and IMHO they do not ), BlowMasters are an inferior design and do not deliver what I spend my hard-earned cash on... performance enhancements. The great sound of Magnaflow is just icing on the cake.

'Nuff said.

Cheers

 

Finally, the voice of reason.

 

i just got my flowmaster 40 series put on a weak ago. love the deep throaty sound it has. an you dont have to mash the pedal to get it. to me at highway speeds the cab noise isnt very loud but some may consider it annoying.
flowmaster for louder better sound ( in my opinion)
magnaflow for more hp

both do sound good dont get me wrong, but the flowmaster has the better sound