i am about to order an exhaust kit for my 66 fastback v8 289

since i notice there is soo much to choose between i get a bit confussed:

i was thinking about :
-Tri-Y header
-2" H-pipe
-exhaustsystem oem style: 2" diameter pipe ,flowmaster deltaflow, with or without resonator?
or
-Upgrade dual exhaust kit 2 1/4" , Features Flowmaster 2-chamber 40 series Delta Flow mufflers
-2 1/4 " H-pipe

or:
- 2 1/2" dual exhaust kit with flowmaster delta muffler
- 2 1/2" H-pipe

or
tri-y headers
Magnaflow Stainless Steel Exhaust Kit ( http://www.laurelmountainmustang.com/magnaflow.jpg ) (looks simple to install myself ?)

my question... does a larger diameter has any benefit for my "standard" 289 engine
are resonators recomended?
ohh. and i often hear that the flowmaster is kinda loud compared to other muffler brands like magnaflow or dynomax ?

thank you
arthur

 

I've got a 66 coupe, running thorley Tri-y's, X-pipe, and I believe it's 2 1/2". The 1/4 difference is moot, and 2" is definately too small if you intend to do any mod's. The only item you may need to be aware of is the length of the muffler will have an impact on the bend up and over the rear-end. Shorter muffler is better so the bend isn't too tight. Also, I added a flange/gasket at the rear of the mufflers in case I want to remove the system in pieces in the future. I believe flow's and magna are baffled, where dyno's are straight thru with packing. I'm using flow's and their fine for sound and not too loud.

 

I had Flowmasters on mine but in the process of changing to Magnaflow mufflers and exhaust tips. Love the look of the product and great looking welds and construction. I wanted something quieter till I "stomped" on it. I like the subtle sound.

 

2-1/4" is ideal for most 289's. Assuming you don't spend much time above 4500rpm (most people don't), 2-1/4" will be fine for you. 2-1/2" is enough to support something like 400hp.

My question is...why are you ordering a kit? For about the same price, you should be able to take the car to a reputable muffler shop and have them custom bend/weld a system for you in under a day. It'll fit better and leak less, and be much less of a hassle than a "bolt in" system.

 

I had a local guy do mine.. 2 1/2. flowmaster 40's.. H pipe.. $350 done right!

 

I like the sound of Magnaflows.

 

Exhaust work through a local shop is one of the few real bargains left in the world.
Find the right place and you'll make the installers day, working on a '66 Fastback is a hell of a lot more fun than a minivan or a Toyota. Have him weld the whole thing, you won't believe how quiet the car will be until you get around back.

 

because i live in the netherlands and everything there is much more expensive..if i get those mufflers from a local shop they cost atleast double the price compared to ordering myself from usa.

oh and after doing some extra search on the net i will go for the magnaflow mufflers.

arthur

 

I'd still recommend buying the mufflers and then taking them to a muffler shop. Bolt-in systems are a hassle and don't always fit properly. Having someone knowledgeable bend and weld a custom system will result in a better final product. Not to mention, shipping that much pre-bent steel out there from the US is going to cost a hell of a lot more than parts and labor at a shop.

 

yea take it to a shop and have them do it.

unless you are a pro and are SURE you can do it yourself.

i bought my own mufflers, and a 10ft piece of aluminized 2.5" tubing and brought it all to a shop. the guy didnt use the 10ft piece but since i gave it to him he only charged me $200 for a REALLY nice job.