My limit on spending on a cat is $200 since im getting an alternator upgrade at the moment. Are there any good ones that will really help me pass inspection that are $200 or less? And also that I have dual exhaust, would I need to buy something in addition to the cat to make it fit or would it be a direct fit?

 

Try the bonez high flow cat on rx7.com. best one ur gonna get for ur 7, try it if it passes i'll get one. Good luck

 

Buy cheap, buy twice.

That said, Rotary Performance sells bolt-on cats, downpipes, etc for reasonable prices.

(for the record, a stock cat costs several hundred dollars and a high-grade tuning cat like from SARD, HKS or FEED costs over $1000)

 

http://www.rx7.com/store/rx7/FCMainConverter.html

 

Any good reviews about this company? http://www.easterncatalytic.com/products/

I see some of their products for as low as $105 on another site.

 

Stock cat

 

i ran a catco cat from summit racing for years, it was less then $100 and allowed the car to pass emissions testing no problem
alot of smaller companies do not make their own product so keep that in mind

 

According to Magnaflow's website, this is a direct fit converter for an FC.

http://www.amazon.com/Magnaflow-2368.../dp/B000JKJE80

I've always heard good things about Magnaflow, but really nothing about their converters.

Just Google "Magnaflow 23688" to find more vendors with that converter.

 

if you have a custom exhaust no direct fit converter will be a "direct fit"

 

I missed the part about dual exhaust. Assuming we are talking about a true dual exhaust uncollected setup, then he's going to be having all sorts of issues. He'll have to cram two small converters in there somehow. I think we need more info on his setup.

 

I've used the magnaflows to pass emisssions. A cheap fuel controller like an SAFC is a good investment too. If you're allowed to do the idle test where the engine is held at 3k rpms for 1 min you can lean out the fuel for that range so the engine barely runs. The engine doesn't need much fuel to run with no load. I've ran around 18:1 to 20:1 afr for the test then reset the fuel after I passed...with readings abnormally low.

 

lol i don't have to pass emissions so i don't have a cat. it is strait piped from the res

 

I too was thinking of installing a catalytic converter.
Girls do not like the exhaust smell :P

 

I bought the S5 Catco 1-pcs replacement system #4689 with pre and main cats. I wrapped the down pipe with DEI Titanium wrap to the pre-cat and it passed the emissions testing with flying colors. I plan to buy the separate Catco main cat #4489 to use with the Corksport SS header that I will also wrap with the DEI titanium wrap. Both of these Catco converters have the air tube for use with the air pump - I still have the air pump and all the emissions equipment on the car.

Of course, fresh spark plugs and an O2 sensor will help pass the emissions testing as well.

 

That magnaflow cat would work for me, i'll just install that for testing and and use my test pipe if it does pass

 

I dont think my exhaust is true dual but its an aftermarket/custom exhaust. The resonator is connected to the exhaust through a y pipe I believe. I actually dont like catalytic converters because i heard it restricts power so im just buying it just to pass emissions.

 

The purpose of a high flow cat is to avoid loosing power running the cat. The downside of a high flow cat is it's useful life is short. So you'd be replacing it every two years here in California just before having a smog check.

You're best buy for the buck is to buy a new good quality cat and a pair of flanges, then have a muffler make a bolt in set up directly replacing the presilencer. I say good quality as the whole point is to pass the smog check, my go through the motions only to still fail. Leave it only long enough to pass smog, then swap it out for the presilencer and put the cat converter on the shelf for use when your next smog check comes up.

 

the single catco I had lasted a long time, I sold it a few years ago and I believe the car is still using it. It did not hinder performance on the car at all. If anything it made it more pleasant not having to ******* stink like exhaust after driving it