[alpha male 67]

ok so the debate continues about exhaust magnaflow , flowmaster and everyone else on this long list , and of course you have headers to throw in the mix--- which in itself is hard to pick!!
so anyway i have spend HOURS online trying to make up my mind--
thread after thread , site after site , i listen to the utube vids , my wife thinks i'm nuts!! "can u plz turn that sh*t down!! you are giving me a headache!!" none for me tonight ---damn!
so and with no end in sight i turn to my fellow mustang owners for help. so please the the sake of all my sanity--HELP!
oh i did get my headers (here)
and was looking at this kit (here)
flowmater has a nice one too , and i understand that is all up to the person and what they like , one might love it , another person might hate it
i guess i looking for a nice rumble , but not so loud you cant hear the tunes , but i want you to know that this is a mustang (classic) and it can mean business --if needed , well thanks guys
i'm going to start the search again!

[65BlueHorse]

I was haveing some major issues trying to pick an exhaust system and this is what i found.

1. bigger pipes = less power at low rpms and more power at high rpms
2.bigger pipes don't equal more power until you get over 5,500 rpm
3. A small block that normally runs between 1,500 and 3,500 and not over 5,500 rpms need 1 1/2 or 1 5/8 inch primary tubes in headers. Anything bigger loses torque.
4. The pipes and muffler must be the right size for the motor (Cubic inch and horsepower) this site has a chart to tell you what size: Sanderson Headers - Complete Performance Exhaust System

As far as the name brand i think it is mostly personal preferance and the same with the sound. As you said different people like different things. I currently have 2" straight pipes put on at a shop(no namebrand) with glasspack cherry bomb mufflers. It sounds pretty awesome but loud pipes can get annoying on long trips. As far as the music goes just crank it up louder thats what i do lol. good luck choosing.

[Pelle51]

I am working on the same thing. I am looking for a complete exaust system that will bolt on to my hooker comp headers and exit the stock rear valance on my 65 fastback. Any help would be greatly appreciated.

[jspagna1]

Been there, done that! From the headers back,
my first exhaust system was 2 1/4" straight pipes through Dynomax Super Turbo mufflers & 2 1/4" tailpipes to the rear valance.
My second & current exhaust is 2 1/2" pipes with an H-Pipe through 2 chamber Flowmaster 40 Series mufflers & 2 1/2" Dr. Gas Tailpipes. Sounds great:
1966 Mustang 50 - Putfile.com

Some other observations:
1. Straight pipes are loudest and least performance output.
2. H-Pipe = An "H"-pipe will improve low-end torque(more torque) as it promotes exhaust scavenging between both banks of cylinders.
The H pipe delivers better low and mid range power (more of a Muscle car sound)
3. X-Pipe = An X-pipe delivers better performance in the upper rpm ranges(more horsepower) and sounds a bit more Euro / exocitc in it's exhaust note.

My experience is that torque wins races, not horsepower. (IMO)

[alpha male 67]

WOW jspagna1 that sounds amazing , very nice and that engine bay --tops, damn i have a long way to go!! you guys and your perfect cars make me sick! , anyway i think i'm going with the magnaflow kit
i found one for the right price so we will see how it turns out , i'll post some pics of it when we get started

[65BlueHorse]

sounds good. glad you decided before you wen't crazy.

[madokang]

I just purchased a set of 40 series Flowmasters 2.5" and was going to have them setup off of straight pipes from my tri-y headers.

JSPAGNA1, your experience and thoughts (also your stang movie) above made me reconsider. I think I better go with H-Pipe.

Question, am I better off buying H-Pipe or having it made when I get mufflers installed?

I'll post some pics and movie when it gets done.

thx

[ieatdrt]

I'm running that same Magnaflow 2.5" in my '70 w/351W. Sounds great outside the car and is really pretty quiet inside. Personally I love it. Installed really easily as well.

[CDavis724]

i run flowmasters on my 66...love the way it sounds...picking an exhaust is really based on preference...kinda like you got your die-hard ford and chevy rivalry (GO FORD!), your gonna run into the same thing when it comes to choosing an exhaust...usually the debate is between magnaflow and flowmaster...im flowmaster guy myself but you really cant go wrong either way..its gonna sound good no matter what.

[steve sturgin]

Hi,

If i can save enough pennies before winter gets here then i will be upgrading my exaust system. I have some long tube headers at the moment and intend sticking with these.

I want to upgrade to flowmaster 40s 2.5", you guys are talking about the difference in sound between the H pipe VS the X pipe. I am led to believe the shorty headers need an H while the long tube need an X.

Any help clarifying this would be appreciated.

Steve

[alpha male 67]

here is a good read i found , help me decide my x pipe setup , but everybody has there own opinion on this , and with newer kits from manufacturers things change , hell if i dont like the way it sounds or performance i'll sell it on ebay

[jspagna1]

Originally Posted by madokang

I just purchased a set of 40 series Flowmasters 2.5" and was going to have them setup off of straight pipes from my tri-y headers.

JSPAGNA1, your experience and thoughts (also your stang movie) above made me reconsider. I think I better go with H-Pipe.

Question, am I better off buying H-Pipe or having it made when I get mufflers installed?

Whatever you decide to do, do NOT go with straight pipes! You need to tie both sides of the exhaust to get the full benefit from your engine.
As for going with an H or X pipe, it is totally your decision. I went with the H-Pipe because it was easier and cheaper. I had the exhaust shop do everything. I just told them what I wanted and I provided the mufflers and the tailpipes.

[jspagna1]

Originally Posted by steve sturgin

Hi,
If i can save enough pennies before winter gets here then i will be upgrading my exaust system. I have some long tube headers at the moment and intend sticking with these.

I want to upgrade to flowmaster 40s 2.5", you guys are talking about the difference in sound between the H pipe VS the X pipe. I am led to believe the shorty headers need an H while the long tube need an X.

Any help clarifying this would be appreciated.

Steve

Steve, I would stick with the long tube headers you have. I have never heard the theory about shorty's need H-Pipe & long tubes need X-Pipe?
I have always heard that Long tubes make more horsepower and guys only use the shorty's on modern cars because of restricted engine compartment space and emmission issues.
I found this write up on long tubes vs. shorty's: Kinda long:Sorry.
************************************************
So why do long tubes help horsepower? As the name implies the tubes on a set of long tube headers are longer than those of the shorty style. This longer tube allows the header manufacturer the extra distance needed to equalize the length of all of the pipes. Often times long tube headers will appear to have extra curves that would logically seem to restrict airflow. This extra length though is intentionally added so that each pipe tube is very close in length. This equalization of length allows for the equalization of pressure for each cylinder. As one cylinder fires it has to overcome the same resistance as every other cylinder, which is simply not the case in stock manifolds or shorty header systems. This balanced load on all cylinders helps the engine make more power. The other added benefit of long tube headers is the exhaust scavenging effect. When all of the pipes finally merge at the header collector, they do so at the same point. As the exhaust from one cylinder flows into the collector this tends to draw air out of the other pipes, creating a negative backpressure, or vacuum essentially. The vacuum effect is increased with RPM to the point that it really starts to benefit the engine by helping to actually pull exhaust out of the cylinder without it having to be pushed out by the piston. This aides in exhaust exit velocity which further promotes the effectiveness of the valve overlap.
**************************************************

[fonzoayala88]

i got some super hooker comps in my ride, and i just bought the summit x pipe kit that they got, and some of there turbo mufflers, the tubing was all mandrel bent steel. so it flows good, i didnt purchase the tail pipes, cuz im debating if i want to go with side exhaust or down the back. but any way, my point is y pay 500 dollars for sum fancy crap that does the same as a 200 dollar kit u personally choose for ur wip? ur gonna have to take it to a shop to get it welded together any way, unless ur doing it urself. its not hard at all just takes time and patience.