Hi all,

I am willing to get a catalytic for my car as I feel that I lost some low end power on my automatic 1997 I30 since I put Greddy catback on it. I really like the Greddy catback so please don't ask me to take it off. I hope that after installing a catalytic, it will help me to get back my low end power (now I just use a test pipe with a resonator on my car).

My car is not equipped with catalytic since it was new (I live in Indonesia).

My question is which catalytic to go with? Also which one is more durable?

1. Magnaflow #99235
2. Vibrant Metal Core Catalytic
3. Vibrant Ceramic Core Catalytic
4. Random Technology Universal Catalytic

Hope to get suggestions from you all

Thanks.

Magnaflow all day just my personal opinion

Is it durable? because I read that there are many people get issue Magnaflow cat? Most of them get problem within 6 months? Is it true?

The Cat is not going to bring back low end power to your automatic.

Do you have an aftermarket intake on the car? If so, go back to stock and your low end (throttle response) will come back.

Agreed

The stock cat flows just as well as an aftermarket

neither. Stick with the stock. I have not heard of magnaflow cat durability issues. If its SS or aluminzed its still good for years. Aftermarket is cool if u not tryin to spend 300 bucks on a OEM cat.

What u lose down low, u get up top. Thats how catbacks work man.

Hi,

I don't have any aftermarket intake. My mods just :

Rebuilt + Porting & Polish Cylinder Head + Cylinder Head Decking to reach 10,8 : 1 compression ratio
JWT Valve Spring & Retainer
MEVI (it comes with the car since it was new )
XS Power Header & Y pipe
Greddy Spectrum Elite
HKS replacement filter
Unichip (piggyback)

and my car never had a catalytic since it was new Is it to possible gain low end power by installing aftermarket cat in my condition?

Hi,

I am sorry but I don't have cat on my car since it new... Probably because my local dealer cut some spec of the car before they sold these car in my country

Hi, good to hear that magnaflow durability issue are not that popular.

how about random technology cat in your opinion?

Is there any possibility to get my low end power without changing my catback? I really like the way it looks.

bumps

They're all the same, practically. The only difference is some of the "high flow" cats have less holes per inch, thus, should be able to handle more flow. However, it should not matter for you. Get whichever is cheapest.

Hi,

Thanks for your reply. Is it also the same between metal vs ceramic core?

Thanks

If you dont have a Cat or codes, then I would leave it off unless you are concerned about global warming. To increase low end, try some phonelic(sp) spacers

Update :

I just an order for Vibrant Metal Core Catalytic. Thank you guys

Hi, thanks for your reply...

I don't have any cat neither codes before (knock on wood)...

Have you tried those phenolic spacers? If it is really can give me more low end torque, then I will try to get them

I understand what it feels to lose low end. But honestly man, what do u need it for?? Not like u pulling a tractor.

Hi, thanks for your reply

I need my low end power because there is no such place to go with higher rpm in my city you know, Jakarta is well known for its traffic jam

dude, putting on a cat will give u less power. unless u need it to pass emissions testing dont put one on.

Yeah I know about it. But hope those thing will help me to increase my low end power. I don't mind to lose some top end power rather than I have to lose my low end power, because I rarely reach higher rpm

Ok I see where ur coming from now. velocity/flow rate, so ur thinking that this restriction would in theory give u more torque and less horsepower? honestly though u will lose both low end torque and top end horsepower. try it if u want but i dont think u'll like the results.

Hi, thanks for your reply.
Yes I am in theory that you listed above. I will let you know how it's work. I've to wait for arround 3 weeks to receive my cat ...

Anyway, if you don't mind may you tell me how to increase my low end power?
Fyi, my car have been equipped with MEVI from its new, and these is the performance mod lists that I've done in past years :
- XS header & y pipe
- Porting & Polished cylinder head
- cylinder head decking to reach 10,8:1 compression ratio
- jwt valve spring & acl bearings
- greddy spectrum elite catback
- test pipe with resonator
- stock airbox with hks replacement filter
- tomei fpr
- a piggyback (havn't done fine tuning yet since these mods)

Thanks in advance

looks like a good mod list , honestly you need to just convert that thing to a 5spd. Will be a totaly differant and more fun to drive car.

hey, how does your car sound with an aftermarket exhaust being that the car is automatic?

Thanks bro.
I really want to have a 5spd A32, but is it become impossible to me since I have go to any junkyard in my country & also the country next to me. The result is there is no one selling a 5spd gearbox for a32, if there is, it is for A32 with VQ20DE.

You can hear my exhaust here...

http://www.youtube.com/watch?v=5WBW-...mment_received