Header install completed... video up

[zr1assassin]

Originally Posted by efnfast

With or without cats?

Those weights were with cat on stock header and without on obx. I didn't use cats

[zr1assassin]

Originally Posted by HAWAIIZR-1

Nice video Chris! You’re a natural and I enjoyed the entertainment too. Thanks for taking time to share. It’s been 15 years since I did headers on my first Z. Ready to tackle this 95 soon. I’ll be sure to give the heat shields the “finger”.


Sent from my iPhone using ZR-1 Net Registry

Lol thanks! I try

[Dynomite]

Originally Posted by zr1assassin

Lol thanks! I try

In 6th post of -Solutions- under Headers
I linked to your first post in this thread as an introduction to your video.

[zr1assassin]

Originally Posted by Dynomite

In 6th post of -Solutions- under Headers

I didn't see that video, I'll check it out, thank you

[Ozruss90]

What are pros and cons of not using the cats. I don’t need them for emission/pollution testing as there isn’t any required here in Oz. I am thinking of putting on an OBX system front to rear. I want a better sound but don’t want a horrible drone. Is it possible to have one without the other?
Cheers, Russell

[zr1assassin]

Originally Posted by Ozruss90

What are pros and cons of not using the cats. I don’t need them for emission/pollution testing as there isn’t any required here in Oz. I am thinking of putting on an OBX system front to rear. I want a better sound but don’t want a horrible drone. Is it possible to have one without the other?
Cheers, Russell

Cats are for emissions only, if you don't have to use them....don't! They hold heat and restrict air flow. Drone levels will depend on set up.

[WARP TEN]

Originally Posted by Ozruss90

What are pros and cons of not using the cats. I don’t need them for emission/pollution testing as there isn’t any required here in Oz. I am thinking of putting on an OBX system front to rear. I want a better sound but don’t want a horrible drone. Is it possible to have one without the other?
Cheers, Russell

My experience with cats and no cats attached to a Corsa cat-back system (on my two Zr-1s) definitely showed that the sound was lessened and smoothed out by having cats. My informal description was that it quieted the system by about 10% to 20%. Not sure how to really quantify that other than with a decibel meter but I found it to be a more pleasant sound although it was still fairly loud. Stock cats do cost a bit of horsepower but the high performance ones are not too bad on that score. On my '95 I finally went with no cats (Illinois no longer requires emissions testing of the older cars) but I also installed a full stock '95 exhaust system so it was just a little louder than stock when I wanted but I had electric cutouts in front of the rear mufflers for a straight through system when I wanted to set off car alarms and frighten children . As to drone, cats or no cats should not impact it. The Corsa system was one of the best cat backs to eliminate drone. I don't have first hand experience with the OBX system but it is a copy of the Corsa externally--Bob

[Ccmano]

Originally Posted by Ozruss90

What are pros and cons of not using the cats. I don’t need them for emission/pollution testing as there isn’t any required here in Oz. I am thinking of putting on an OBX system front to rear. I want a better sound but don’t want a horrible drone. Is it possible to have one without the other?
Cheers, Russell

And you will get noticeable exhaust smell. The degree of the smell will depend on tuning. I’m running a full OBX system including headers. The sound is nice but louder than I expected. I can’t say it drones but gets close under some circumstances. Exhaust sound and tone is very subjective. I’m adding cats just because of the smell.
H

[Ozruss90]

Thanks for the feedback. When you say your going to add cats to deal with the smell, what cats will you source for that application?

[Ccmano]

Originally Posted by Ozruss90

Thanks for the feedback. When you say your going to add cats to deal with the smell, what cats will you source for that application?

Magnaflow’s will replace the OBX cat simulators.
H