hey guys, i was wondering.. im looking to get the HKS exhaust and stillen HFC's for my nxt mod. so i just came across a pair of Stillen HFC's. now my questions are:

I do not have the HKS exhaust yet, is there any welding required in order to install the cats, or do they replace the stock cats and are simply held in place by bolts?


Will i notice a change in sound due to the Stillen Cats, on a stock exhaust?

thanks! and for those of you who might have the Cats, how do you like em, any problems with them?
thx a lot

 

It's bolts on. Yes, aftermarket HFC or TP will makes louder sound than stock cat.

 

They replace the stock cats, no welding required.
The sound will increase.
They are a good product but the cel might come on after a while.

 

I assume the photo above is accurate. I see no braces to attach to the car.

 

simple bolts on. No welding require. I'll recommend taking to an exhaust shop and have them replace it for you. DIY is very difficult!! unless you have access to lift & power tools..

Yes sound will definitely change. Also interior sound will change as well. Look on youtube for sound clip.

 

nice thanks a lot guys! what am i expecting to pay in order to have an exhaust shop swap out the cats??

 

All depends on where you live. Call around and get some quotes

 

It depends on the shop, but $100+ in general.
I'll put up pics in a lil bit hold on.

 

i had stillen hi flow cats, i purchased them new from stillen, they were not good at all. they were longer than my stock cats, the pipes hung down to far and caused my exhaust to hit my rear crossmember and to sound like a can hitting the car over every bump and rev. they also went bad within the first two weeks of installing them and made my powerband loose power. i had it looked at and dyno. there was a huge downspike in the dyno. as soon as i took them off the curve was normal and i got my power back.

i would recommend fast intentions. great customer service, price and product.

 

That's strange since this the first bad thing I've heard about Stillen HFC's. But I guess not all of them can be perfect.

 

Don't know about the Stillen HFC's. I have the Berk high flow cats and along with the Kinetix plenum the powerband is very consistant also the sound is louder with the HKS exhaust system. Easy install if you have access to powertools, and some wd40 to loosen the bolts oohhh & plenty of long extensions, I used about 2 feet of extensions to get the drivers side from inside of the engine bay. The drivers side is the tough one to get to with the steering running right there, do it yourself, it is easy enough.

 

hmm interesting! thanks, i got the Stillen cats and already had them installed yesterday. like you said it does change the sound of the stock exhaust a little bit. it sounds more deep and you can def hear more air flow at higher rpms. it also has a higher pitch sound at higher rpms ive noticed. i called around for installation and i got diff quotes ..but all between $120-180. however i asked one of my buddies if he knew any shops that would do it for cheaper and what do you know...he knows the guys from "2Kracing" and they were willing to do it for me at a lower price. i ended up paying $70 and more than likely have found myself a new performance shop to do all my mods at a lower price! here is the vid of my cats:

BEFORE
http://www.youtube.com/watch?v=w8-ryNvQ5PY

AFTER
http://www.youtube.com/watch?v=ZpGry...eature=channel

 

Whatsup German,

Let us know if you need anything else and we are more than glad to take care of it. Also remember we do custom fab exhaust systems as well starting at $350 installed!

See ya later

 

LMAO is this the 2KRACING in Reseda!??!

 

Yup, we are a Sponsor here. Great quality video by the way.

 

thanks a lot man. yeah you guys did a good job im really satisfied. couldnt be better! i might actually have a couple of guys who are looking into modding their cars. as soon as they decide on what they want. i'll tell em to swing by. great customer service/prices. i'll have my exhaust installed by you guys as soon as i get it too. i'll keep in touch