Exhaust Inlet Size

[So Cal Mark]

many many muffs are stainless now, and there are several grades of stainless. Not all of them last a lifetime

[maytag]

Its all stainless...will not rot.

R

hmm. As far as I know, MOST high quality mufflers are stainless. But I'd point-out that just because it's "stainless" doesn't make it high quality either. There are many grades and variants of "stainless". And they certainly -will- rot.

[Divers]

Sorry..should have stated 304 stainless.

[Divers]

Well...I went with a Flowmaster 12018400 HP-2 Series Hushpower Muffler from Ebay for $114 plus shipping. It has a 2" inlet and outlet which should be plenty.

I am planning on using the stock manifold and the downpipe. I am trying to save some cash so I thought I would give installation of the exhaust a try. Is this idea crazy? Already have issue's like how to hook up a 2" pipe to the stock downpipes etc etc etc. Is this a job that really should be given to a professional (with a mandrel bender). Any where I could buy pre-bent 2"???? I am just going straight pipes to muffler? Nothing in stainless needed.

Input?

Thanks!

[baltobernie]

This isn't something you can do, unless you buy a huge collection of short sections of various bends of different radii, then cut and weld them all together. Look for a muffler shop that caters to performance exhaust installation, NOT a general-purpose Meineke or equivalent. By the time he is finished, your total expenditure (including the Flowmaster) will be about what you would have spent on a header-back bolt-on system from one of our vendors.

Are you locating the Flowmaster under the passenger seat? If so, it shouldn't be too loud. If you place it in the original location, at the end of the system, you'll hear quite a drone at highway speeds.

[Divers]

I must be put of touch. A header and exhaust system from a vendor pushes $1400. So far I have $120 into this. Are you saying the exhaust shop is going to bill me $1300 for piping and install?

[fiat218]

I must be put of touch. A header and exhaust system from a vendor pushes $1400. So far I have $120 into this. Are you saying the exhaust shop is going to bill me $1300 for piping and install?

exhaust cost me 300, from header pipe back

[baltobernie]

$500 for a complete stock system from the usual vendors. You'll probably spend $2-300 at a good muffler shop, plus the cost of your muffler. OK, if the muffler shop does a great job, you'll probably have a better-performing system with the 2" pipes, but there are plenty of hacks out there.

[Divers]

Gotcha! I know I could have gone stock, but with the engine I just built, stock was not going to cut it

I was planning about $500 - $600 for the exhaust piping and installation.

Robert

[baltobernie]

Probably a good call, since you've invested in other mods.

Authorized shops that carry Flowmaster, Borla, etc. are a good place to begin, as they are already performance-oriented. If they can work with the 4" stuff out there nowadays, your car should be a snap! Personal references from other gearheads are a resource we Fiatsi often overlook; you probably have musclecar, Corvette, etc. enthusiasts in your town who can make suggestions.

My guy incorporated the new style hangars, the rubber figure-8 on two welded studs, and a few other tricks. I'm satisfied with his work. I used a 2" Flowmaster 952060 at the back. (Click on image to Play.)

[fiat218]

you need at least 2" from manifold to the muffler if you have a 2L motor. Be aware that a muffler shop bender will reduce the diameter of the pipe when they bend it to go up and over the axle. Few muffler shops have mandrel benders. A larger diameter system will reduce back pressure. The design of the muffler can also increase backpressure. The only pro from backpressure is reduced exhaust noise. Backpressure kills performance by pushing exhaust back into the cylinders. If you're interested, google reversion and you can read volumes by current top engine builders about the subject

I don't understand something, u say 2" from the manifold to the muffler, so what if u have the factory exhaust manifold and u want to change the size but keep the manifold on, does it make sense to start that 2" down under the car, or that just plain stupid and a waste of money, 2 " should be from the start to finish as to what u are saying?

[Divers]

Jim,

I am actually planning at cutting the down pipe where the two pipes come together and attaching a 2" pipe from there. I believe stock takes those two pipes into 1"3/4 or something obviously less than 2".

Robert

[baltobernie]

Yes, you can cut the collector at the point where it then matches the desired exhaust pipe diameter. Sorry, I don't have a photo of mine.

[rodman]

Jim,

I am actually planning at cutting the down pipe where the two pipes come together and attaching a 2" pipe from there. I believe stock takes those two pipes into 1"3/4 or something obviously less than 2".

Robert

How does it sound with that Flowmaster Flowmaster 12018400 Hushpower HP-2 Muffler??? Got video of it ?