Jump to content
SAU Community

3" (BOLT-ON ALSO), 3.5" and 4" CATCO HI-FLOW CATs (stainless steel inside)


Recommended Posts

Hi guys,

A new CATCO CAT is out in the market, and this one is 304SUS (surgical stainless steel) outside, and unlike the other high flow CATs which have a ceramic honeycomb inside, this has a stainless steel honeycomb which has 200 holes per sq inch instead of 400 holes per sq inch, which basically means the holes are twice the size of the other Hi-flow CATs. It is now the highest flowing CAT on the market, which would cost in excess of $600-800 at exhaust shops.

The CAT is available in 3", 3.5" or 4" piping. The actual round body of the CAT is 5".

The CAT has been conveniently made as a 3" bolt on for R32 & R33 GTST/GTR, 180SX, Pulsar GTiR, R34 GTT & S14/S15 200SX) = $440

$410 for 3" Universal

$470 for 3.5" Universal

$480 for 4" Universal

cheers,

Michael

Edited by BATMBL
  • 2 weeks later...

the testing has been done!

CAR: 1990 R32 GTST Type M

Specs: 3.5" cat-back exhaust, everything else STOCK (even stock air filter and boost!)

Plugs were changed to NGK coppers (heat range 6).

Results:

148kwrw - standard dump/front pipe and standard CAT (not compliance CAT, the factory nissan CAT)

standard dump/front pipe and the new Hi-flow CAT with stainless steel inside - 158kwrw. INCREASE of 10rwkw!! ...as the hp would increase on a car, so would an even bigger increase in hp compared to standard CAT and this new CAT.

split dump/front pipe and standard CAT - 164kwrw. INCREASE of 16kwrw!

open/bell mouth dump/front pipe and standard CAT - 156kwrw. INCREASE of 8kwrw!

new split dump front pipe and the new Hi-flow CAT with stainless steel inside - 175rwkw. INCREASE of 27kwrw!!! thats more increase than a 3" CAT back exhaust- usually about 20rwkw.

hope this clears a few things up about the need for a 3" hi-flow CAT and the difference between bell/open mouth and split dumps.

dont have a scanner yet, but when i can post the sheets up, i will!

cheers,

Michael

  • 1 month later...
  • 1 month later...
  • 3 weeks later...

we did some independant testing on 3 cats last week and here are the results.

FLOW RATES IN CFM:

3" CATCO CAT (has 5" body, 200csi steel inside) = 706CFM

3" METAL CAT (has 4" body, 200csi steel inside)=629CFM

3" MAGIC CAT, we welded cone reducers and 3" piping (has 4" body, 300csi steel inisde)=540CFM

The flow test on the 3.5" piping CATCO CAT showed a flow of 885CFM & for the 4" piping CATCO CAT it was 1015CFM!

as you can see, the catco cat has the most flow and cannot be compared. one thing we didnt test was the CFM of a straight through 3" pipe, but from memory its about 1000CFM(??)

cheers,

Michael

Edited by BATMBL
  • 1 month later...

i personally would never stock them, you can ask justjap how many returns they get... the worst cat in the market.

the stainless steel will turn purple within the first few hours of driving (meaning the steel cant handle the heat since its really thin, and from this the biscuits will start moving because the steel flexes from the heat and then you get ratling etc...). the cat doesnt flow well at all due to the poor design and cheap biscuits inside. overall, its a cheap china made "cat" which doesnt have any EPA and/or CARBs emission approvals.

xforce is all about a low price, but essentially theres no quality.

  • 3 weeks later...

Hi BATMBL

Can you tell me the length of the 3" CAT for the R33? ($190 one)

I took mine off to replace with a cheapy i bought, but the cheapy is too long. I think it will be going back.

My current one which is a Catco but looks to be maybe a 2.5" is 318mm long. Does that sound right?

Thanks..Birnie

hi birnie

i dont have one with me right now, but that does sound about right. any of the 3 cats you can buy bolt on for the r33 are the same length flange to flange and angled correctly, its just the smaller one has 3" piping coming out of it, where as the large body doesnt get to have the 3" piping come out of the cat, but the flanges are welded right at the ends of the cat, where the 3" piping would have started.

the bolt on cats i have for r33 are a direct fit from the standard cats, and ive never had a problem with fitment after selling many of them. the same bolt on cat will also fit r32 skyline and pulsar gtir and 180sx/s13 silvia.

cheers

hey mate do you have the new pipes with the plug on the other side of the dump yet?? when you get the new ones in the stainless let me know.

very keen to get the r33 gtst combo that i pm you about

thanks mate

  • 2 weeks later...

Michael,

Are the prices the same for forum members as they are for anyone who finds the web site to buy one of these cats ? Web site shows same price ( $440 ) Also, are they the same price for the SAU Car Club members ?

Cheers.

hi

the website was made to reflect the prices i have on the forums, so thats why its the same. i will provide free shipping for the $440 cat for SAU members only.

cheers

  • 4 weeks later...


  • Similar Content

  • Latest Posts

    • sold listed as a Tomei LSD 1.5 Way For 1998+ Nissan Skyline ER34 25GT RB25DE w/Open R200 https://www.ebay.com/itm/174006114594?campid=5338967980&mkevt=1&mkcid=1&toolid=10050&customid=&mkrid=711-53200-19255-0&loc_physical_ms=108689&loc_interest_ms=&campid=5338967980&mkevt=1&mkcid=1&toolid=10050&customid=71883f2ccc571356e0a757bc7adfdde2&mkrid=710-53481-19255-0&loc_physical_ms=108689&loc_interest_ms= it went in like butter all gears, alignment, back lash etc, rotation and clearances correct, and if rolling all rotates smooth and free when coasting down road , clutch in or out over 10 mph smooth... its the binding, clunking and jerking from a stop that is most concerning, also seems like its going to tear the tires off in 10 miles of normal road driving. 
    • What 1.5 way? There's no such thing really as a 1.5 way, just different ways of explaining 2 ways with different ramp rates. HOWEVER. In any driving in a straight line your 1.5 or 2 or 1.7 way should have no clunking at all. With the clutch fully depressed the diff should be silent (unless it's welded but I'm assuming it's not). Something aint right here.
    • Clutch is a spec brand, new clutch system,( PP, flywheel, friction disc, etc. pull type) installed 100 miles ago, with no problems.
    • looking for some help and maybe some insight on others experience with a new LSD. R34 GT ran and drove beautifully, but always alot of grip loss due to the open R200 rear end, so I just installed a new 1.5 LSD way into the stock open R200 for a ER34. Simple. Everything seemed right. I test drove for the first time this weekend. as I started to back out the garage the first time slowly with tires straight it sounded and felt like I had a loose or half disconnected drive shaft...that was clucking around loose and shaking entire vehicle, and making it feel like the trans clutch was spontaneously slipping then grabbing very roughly while just letting out pedal slowly. I backed it out went to pull forward with the same noise, shake and slip grab feeling with hesitation, I turned the tires to back out more and then pulled ahead some same thing but worst because of added wheel resistance (which that I expected) puzzled … pulling it back in checking everything over and finding nothing wrong, I tried it the next day. same thing, couldn’t believe how it shook everything again making a terrible noise and making it feel like the trans clutch was slipping and grabbing, but I got it out of garage into the driveway, got it straight, drove forward and then reveres a few times in a straight line everything shaking , causing what felt like clutch slip and grab every time, sounded like right behind front driver tire and I could feel it in the floor board with my feet,... worst right when beginning to let clutch pedal out to engage slightly, shuttering and sounding terrible along the way…I managed to slowly get down the road, babying it the whole way, once I was rolling (out of 1st) seemed to be better and between shifts, then clutch felt closer to normal…not slip/ grab etc., but back down to any stop, straight road or turning, same thing. Made no difference if all tires were straight or if I was turning. All other gauge read out correct. with in 2 miles as planned I reached the empty parking lot and performed the break in procedure that came with lsd, essentially to drive in a figure 8 a bunch.  Did this, binding chattering, and shaking the car the whole way. I drove it back home seemed somewhat normal once I was in straight line and past 10 mph or so, and I know it will “bind” on corners and cause some tires squeal when turning especially from a stop, but when I begin to move it still causes what feels like the trans clutch to slip and jerk badly as well as shaking the entire car, and sounds terrible, that I didn’t expect. I used the fluid they supplied with LSD kit and did the breaking, planning to change fluid as they suggest after breaking, but wondering will it get smoother or less aggressive with use? maybe a 1.5 is just too aggressive for normal road driving?   I have a LSD that I put in my 71 cuda when I restored it, with amazing smooth , quite yet effective results. Different style LSD but that ones a joy to drive. maybe expecting too much from this R200?
    • Join SAU NSW for a flame-grilled feed & flame-spitting cruise! Sunday 17th August 2025 3:30PM Meeting Archies Flame Grille Sylvania Waters 4:45PM Cruise Departure 5:15PM Arrival at Cape Solander Kurnell Meet Location: Archies Flame Grille Final Destination: Cape Solander Kurnell *Disclaimer* There will be a lead and follow car so no one should get lost. If you would like to attend or bring others along please put your name down and a +1 as numbers will be needed prior! This is NOT a race and we will all be adhering to all road rules. If this is what you want please come to one of our many track days. This is an official SAU:NSW event and will be run under a CAMS permit. One of the things that really sets our club apart is our commitment to being true enthusiasts. When on normal roads we strive to maintain good relations with the authorities as well as the public in general. When attending one of Skylines Australia NSW events please try to: • Be aware of surrounding environment and act accordingly. • Drive courteously on the state’s roads as a true enthusiast should. • Understand how important it is to maintain the good name of SAU NSW and thus, treat others accordingly. • Any misbehavior will not be tolerated and you will be asked to leave.
×
×
  • Create New...