IF they are "myths" then please provide the factual data to disprove the "myth".
What is the "right" flowmaster for my application?
Flowmaster pitched the catback system for the GN claiming xx HP increase over stock. They never compared against the other brands, though as other brands came to market they compared to FM and determined thier product made more power than the Flowmaster for this turbo application.. (and a few others)
Notice now that flowmaster no longer provides a part number for a catback system for the TR. If it worked and made the most power they would still be marketing it.
Yes now we are talking! Well it depends what you would consider "right". If loud isn't an issue, then I'll assume by "right" you mean newest technology and highest CFM flow?
Yes flowmaster pitched that idea exactly as you said. but remember flowmaster runs their company old school style and that idea + setup were designed in the late 80's but still sell or why change or update it is their thinking im assuming. Consider my point further because they didn't even get on youtube until a few years ago. my point is their marketing sucks imho as most american vendor parts companies even some on this board. I wish they did it differently but hey I can only cry about it. I agree with you if companies would just post tests and results and have some marketing skills their net would increase that much would be obvious, but once you start digging trust me real explanations get nasty. Anyways a good example of a vendor who stands out look at guys like don wang, he just doesn't fix transmissions haha if you get my funny way of saying it he posts more results and testing data and experiments then any vendor i have ever meet.
Well actually flowmaster does have a current part number (17102) for that stock replacement system you mentioned, but remember this is the same idea/marketing/product from the late 80's. And they only keep it because its there and it works and a few are sold each year netting a profit without having to do work. the listing can be found on their home site. As i mentioned before it doesn't work the BEST its just there imho.
** NOW let me know about your exhaust and I would LOVE to help you pick some new flowmasters because believe me they may SUCK @ marketing but not muffler design. The question becomes do you want a dual/single? What size? downpipe size? What cat are you using if any at all? How loud of a DB limit do you have. After those then I can help pick the right flowmaster. If I was lucky enough to work at a shop I would post all the info and test results. The only data I have is what I have researched, the mufflers themselves and their core designs.
That's my rainy saturday update during lunch. Drinking a new microbeer "knucklesandwhich" made by a local brewer who started in 2008! Bootlegger's beer from Tustin, Ca. only one city over from me! Cheers.