Jump to content
SAU Community

Recommended Posts

Hi guys,

I have split front s steel dump / front pipe running into my 4" HKS Hi Power Exhaust into a standard catco cat converter.

I can get the CATCO Metal Cat 4" Catalyic Converters at a reduced price from a friend and they claim to flow at 1054 CFM

or I can buy a METALCAT 3.5 Inch Cat Converter and have to run 1/2 inch reducers to make it fit. (they dont make 4")

I think going down in size is stupid and i should go with the catco even if their CFM claims may be a bit overrated.

I need some advice guys.

Thanks

Hi guys,

I have split front s steel dump / front pipe running into my 4" HKS Hi Power Exhaust into a standard catco cat converter.

I can get the CATCO Metal Cat 4" Catalyic Converters at a reduced price from a friend and they claim to flow at 1054 CFM

or I can buy a METALCAT 3.5 Inch Cat Converter and have to run 1/2 inch reducers to make it fit. (they dont make 4")

I think going down in size is stupid and i should go with the catco even if their CFM claims may be a bit overrated.

I need some advice guys.

Thanks

Hey,

I don't know that the claims are overrated; if the cat is the one I'm thinking of the actual area of

flow through the cat material is more like 6". Does it look like this:

post-14974-1175308385.jpg

You might be able to cut the ends off the metalcat cat to get a true 4" cross-section; I don't know.

Regards,

Saliya

hey mate .. I am not actually sure what a 4" catco metal cat looks like... but i can get them cheaper...

if thats what they look like lol f**k yeah thats huge.

anyone on here use the catco's???

I do. But as said earlier, all of the metal substrate cats are much the same

The size is the diameter of the center section, not the inlet and outlet size, so a 4 inch is 4 inch center section, it could still have 2.5 inlets. they are available in a variety of inlet sizes and centre diameters when not flanged. Bolt on ones are usually 3 inch in/out to suit the stock flanges.

4inch in/out metal cat with 5inch body

Wazfone139.jpg

also if you got the 3.5 i cant see it making any restriction as you said your runing a split dump/front.. so you've obviously got a largish low mount.. 3inch flows plenty unless your making more than 450-500hp at the treads.. i cant see the smaller one being any restriction

Edited by rb26s13
4inch in/out metal cat with 5inch body

Wazfone139.jpg

also if you got the 3.5 i cant see it making any restriction as you said your runing a split dump/front.. so you've obviously got a largish low mount.. 3inch flows plenty unless your making more than 450-500hp at the treads.. i cant see the smaller one being any restriction

what sort of cat is that? looks the part!

If i get a 4inch in / outlet cat converter I wont need to take it to a muffler shop to have it fitted because I wont need to mess around with inlet / out sizes, just gaskets and maniseal!!!

Plus a 4 inch in / outlet cat is bloody huge..

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • HFM BM57 has a "bad" knee point, IIRC. It's not the same thing as the later R chassis MC.
    • The ATTESSA is functionally identical to R34; there were a bunch of JDM models that continued ATTESSA including Fuga/Q70, Skyline/Q50, Cima etc as an option. All with Auto only and I think mostly for snow regions. AFAIK there were no AWD VR30DDTT sold in Australia - it is on my to do list to check regs for racing a LHD car in Targa/ATR/AASA/CAMS events because if I can get the auto to work it would be interesting to run a 4wd car The Ecuteck TCM tuning is the same model as their ECU tuning, they already have it for R35 and Dose's favourite, BMW. You buy "points" to allow your computer to be tuned, buy either a bluetooth (phone app) or bluetooth+USB+Key (phone and PC) dongle, and pay for a tune that will be locked to your tuner ( ). You can also access the tuning software yourself but 1. it is mega expensive and 2. these computers have a billion parameters that intersect, so how could you ever spend enough time on it to get a decent result.
    • Or, is it a case of what it is like owning an R series Skyline? NFI what the previous owner has done or fiddled with... Ha ha ha After reading through this thread, I went on a bit of a research about the Q50/Q60. Now I'm quite intrigued by them! Is the AWD in them more like a WRX where it's always AWD, or is it more like the ATTESSA in the GTRs? By the sound of this TCU tuning, this sounds like a case of someone has made some real software for it, and you just need the right piece of hardware, and then you license that specific vehicle/TCU. Or is this a case of the software will be really expensive so only a few tuners have it, and you still have to pay a license per vehicle?
    • By popular demand.. it was a coil. Got my hands on 1 new OEM coil, replaced with the one that made the less noise difference when I unplugged it while the car was running and started the car up. No stutter and the engine light was gone. I guess I’ll buy the other 5 they have lol
    • No, code 21 is very straightforward. It can only be the things described in that diagnostic flow. In fact it has no way of knowing that the spark plug resistance is out of spec.
×
×
  • Create New...