want to remove the cats on my 85 TR

Sound is more a function of the muffler than the test pipes/cats. Yes, it'll be a little better with pipes, but not dramatic. If you want sound, consider a new muffler. (Of course, I'm partial to the X-OST brand: http://www.ricambiamerica.com/product_info.php?cPath=739&products_id=262097 But there are lots of choices.)


You can buy "off the shelf" pipes for a TR for $750. Call if you're interested. We don't list them on the website:
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You should be able to get the pipes from Ricambi.

 

FChat sponsor "Nick's Forza Ferrari" sells test pipes for TRs too:

http://www.nicksforzaferrari.com/forzaferrariwebsite1_004.htm

 

Any chance someone can make some out of run of the mill stainless steel and sell them for less??? 600-750$ for 2 pieces of footlong tubing seems like an aweful lot.

Almost makes a 3000$ exhaust seem cheap .

 

Had mine made(355C) for 200.00 and that included ceramic coating and the 02 bung. Sorry sponsers.

 

Vern, did you have to take your car to a muffler shop, or did you just take the cats and they worked off that?

I really don't want to drive into a Meineke Muffler shop (or whatever) in a Ferrari. They would probably damage it on the lift...

 

We can make them in both a test pipe and a high flow cat. Please contact us for pricing at [email protected]. Installing an H pipe will be very hard if not impossible to do on the testarossa. If you are worried about it sounding to dirty just put a 100 cell cat in. Again we can make both.

 

In my 5 years of TR experience I have had the stock system, stock muffler with gutted cats and precats, a Borla system with no cats or precats, and open headers with straight pipes. If your pre-catalytic pipes still have the "stuffing" in them you will not get much improvement in sound by removing just the cats. If you remove the guts from the precats and eliminate the cats but keep the stock muffler it will sound quite a bit better and may be about right for you, but still only maybe 60% to 70% as loud as an aftermarket exhaust system. And if you remove the cats and "gut" the precats you WILL get an improvement in performance and throttle response despite what some people say. With hollow precats and no cats with the stock muffler many said my car had a high shrill sound when running hard through the gears....most said it sounded nice. But with the Borla sysem....straight through pipes and mufflers....the car sounds awesome. I'm not sure what affect an h-pipe would have on a TR but I would imagine it couldn't hurt...but space constraints make this a hard thing to do. Sorry to run off at the mouth about this stuff....just get carried away sometimes. Bottom line....anything you do to get more noise out of your TR will only make you happier!

 

I took the cats in and had them work from that. Muffler shops aren't allowed to R/R cats with non cat stuff. Something like a $50,000.00 fine if they get caught

 

I CAN make the piece pictured below ............in stainless steel, with the O2 bungs and triangulated flanges for well under $750 (may even be able to accomplish an H piped pair, for a bit more $50-75 lets say)...........Not polished mind you, for I imagine $280+ or - $20 for a pair?!?!?!?........If there is interest let me know and I will start the R&D.........Kerry email [email protected]


By the way does anyone know if the flanges are mounted "ridgid" to the tube itself or are "free floating"?
The pix seems to show a weld bead around the inside of the flange. Anyone have one in hand?

I infact will see about getting my partner to start on a set for my '87 TR .........at this time I am away on an extended business trip for a few months..................
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excuse my ignorance, but what is the point of keeping the O2 sensors if the cats or pre-cats are removed? is it to keep the slow down lights from coming on?

john

 

The O2 sensors are quasi-needed on a US TR whether you have cats or not (they are used by the injection system to control the A/F mixture); it's the thermocouples that are not necessary if you do have not cats (i.e., even if something goes wrong and raw fuel is getting dumped into the exhaust, it will not ignite if you have no precats and no cats).

 

thanks steve

john

 

...or enough Ferrari experience to comment much on this:

But, here goes anyway! Are you really sure you want to do this? I am shopping for a testarossa and one really good car that I wanted badly had the whole exhaust system removed from the headers back and replaced by a custom system with no cats, precats, or anything.

There were just 4 pipes into 4 small mufflers and on out to the external pipes.

The O2 sensors were just on two of these four.

The owner had lost the original equipment, and it would have just cost to much to replace it so I could pass ENV check and get this car registered in Texas.

Also, IMHO, it did not sound nearly as good as the quieter stock system. Kind of had some weird resonances as well as a really irritating hard knocking sound at idle.

 

A testa with straight pipes screams like a F1 race car. High flow cats are the better way to go though for the street. You dont want to be blowing flames out the back, smell fuel, have smoking coming out, etc. Even if you dont run cats all the 02 sensors have to be plugged in regardless. They will take a reading from the exahust to tune the air fuel ratio.

 

Nick,

I have my 86 TR in various pieces laying around the shop at FofCF. I was considering doing something with the exhaust as long as there was no labor involved (they have to put it back together anyway).

What did you end up doing?