91MiataKC

Does anyone make an exhaust system for the 5.0 with the 7.5 rear end? Thanks

tbone heller

I had mine custom made from 2.5" pipe with Magnaflow cats, mufflers, & x-pipe for less than $800.00 . The headers came with the kit from Monster Miata.

MRM331

The local Menekie made all of my exhaust systems up. I use 2.25 aluminized pipe and Borla mufflers which usually runs me about $1000 each time out.

If you really have a problem finding a shop that can make one up for you locally I MAY be able to see if my guy can make one up for you using my car as a jig. I've thought about this in the past but really don't think the profit marginis enough to make not having a V8 Miata to drive for a week or so worth it.

To get the exhaust shop:
Go get a AAA membership. The cost for one year most likely will be less than the cost of getting the car towed to the shop without it. The only stipulation is that once the car is towed to the garage you can't have them tow it away again. You can however try to drive it home and if it has problems have them tow it from that point.

-Jason

tbone heller

I borrowed a friends car trailer for a week for the trip to the exhaust shop & to work so I could align it.

91MiataKC

Thanks everyone for your help. I really appreciate it, since this is my first miata conversion.


Would you mind sharing the part numbers for the cat, mufflers and x-pipe from Magnaflow? I too will be purchasing my kit from Monster Miata. Thanks




I do have a shop that I have used for other exhaust work, so I will have to contact them and see if they are interested in doing the work.
That was my biggest concern was getting the car there and not having to pay for a tow service. Also, I guess you can't start the car prior to the exhaust install, since the O2 sensor will not be present. Thanks

I do have some friends that have trailers that may work, I will have to consider that too. Thanks

tbone heller

"I guess you can't start the car prior to the exhaust install, since the O2 sensor will not be present."

It will run without the O2 sensors, or you can mount the sensors into a set of collectors & bolt them to the header.

epantoja

That's exactly what I did with the O2 sensors. I also connected some flexible metal piping to a pair of inexpensive THRUSH mufflers. This way I can start and run the engine without disturbing the entire neighborhood. I plan on keeping this set up while I still work on the rest of the remaining “to do” list. Then when it’s all finish I’ll take it to an exhaust shop for the custom exhaust.

91MiataKC

Thanks for the information on mounting the O2 sensors in the collector pipe and using inexpensive mufflers until I get it to the muffler shop. Thanks again for all the help.......

MRM331

I'd keep the O2's unplugged until they're ready to be installed in the exhaust system. If the ECU does not read them it simply will run in open loop.

Starting the car with only the headers is fine, although it will be very loud (like a P-51 Mustang). I also would not let it run too long in that state as the headers will be dumping right ito the backs of the backs of the front tires.

The only downside of the AAA method is that you have to be able to drive the car away from the shop. Usually I just make very sure to try my best to bolt the control arms on using the same marks as when I took them off (mark the ecentrics with a paint marker or sharpie) so that the alignment is "OK". This has worked fine so far for me for the 30 minute drive back to the garage from the exhaust shop.

Also, since AAA is really for "emergency" road service you sort of have to tell the guy picking it up that the original exhaust "fell off", not that you just built the car and it needs its first system installed. The guy will nod and smile and sign the job off.

-Jason

91MiataKC

Thanks Jason for the info, I will definitely keep that in mind.