Im getting a shop to put my exhaust together and i talked them into putting it on w/o cats and resonaters but he said i should look and find out if Z's run better with or with out that stuff on the car, if anyone knows it would be appreciated alot.

I hate cats

Your avatar says you're N/A. Removing your catalytic converters and resonators will only do two things: Make your car annoyingly loud and make your car a gross polluter.

Being loud can be justified if your car is fast. But being loud and slow is ricey, IMO. The horsepower you'll free up will likely be not much.

But how loud it will be and any HP gains can be determined by the width of your exhaust piping. How wide ya going?

Yeah n/a's with out cat's are really loud.. trust me stillen headers resonated test pipes non resonated h-pipe and hks hiper exhaust means I can't sneak in late at night.

Lets say gutted cats on NA reduce performance and it's been proven I think.

Honestly if you want to sound loud and obnoxious, and raspy, then testpipes are the way to go!

Well for the 1st thing i dont want the be loud at all i want a nice clean sound and im going with 2.25 pipes, he said(exhaust shop) that 2.25 is what would run nice. So you guys think i should put my HKS tips on and be done? Also the extra HP i would gain from doing that wouldnt be worth it right?

itZjoker wrote:Lets say gutted cats on NA reduce performance and it's been proven I think.

Honestly if you want to sound loud and obnoxious, and raspy, then testpipes are the way to go!

If this is what i was thinking then i guess just my HKS tips ty

IMO i think everyone should go with cats. It will be just a matter of time before it becomes law everywhere and the damage to the environment i don't believe is one persons choice to make alone. and for a 5 hp gain do you really think its gonna make that much of a difference?

i actully have test pipes nd apexi N1 X 2 exhaust 2.5inch nd when my Z was an n/a it sounded really good. it was low, agressive sound. yes it was loud but not to where it would bother you at all and to where you would get pulled over. Couldnt complain about it at all.

yea true off topic but the guy at the shop was saying it would be more about like 15 to 20 hp :/ he might of been just trying to do that so he could get my cats

15 - 20 on a TT maybe

dcskater676 wrote: the guy at the shop was saying it would be more about like 15 to 20 hp :/

Dude, I never trust shop owners. I tell then WTF I want to buy and to keep their suggestions/input/comments to themselves. Research what you want before you walk in the door. Alot of times, those guys will try to talk you into buying some bullshyt...

simmode1 wrote:
Dude, I never trust shop owners. I tell then WTF I want to buy and to keep their suggestions/input/comments to themselves. Research what you want before you walk in the door. Alot of times, those guys will try to talk you into buying some bullshyt...

My dad is one of those owners Lol, I see what you mean though. Btw it's a $2500 fine and I think your business license might get revoked for the shop that cuts the cats off your car. I was checking out the competition for my dad and one guy told me instant 35hp

no cats=smelly

BeastZ32 wrote:Btw it's a $2500 fine and I think your business license might get revoked for the shop that cuts the cats off your car.

Depends on area. In a lot of TN counties there's no emission laws.

itZjoker wrote:Lets say gutted cats on NA reduce performance and it's been proven I think.

Honestly if you want to sound loud and obnoxious, and raspy, then testpipes are the way to go!

It's a no brainer. First the hot air is pushed into a larger area...condensed gas is now allowed to expand. Because it expands it cools down, which slows down and becomes more denser. Which is hard to move. Which hinders flow. Then it's forced back into a smaller pipe again.

If you swear by gutted. You are simply retarded.

dcskater676 wrote:Im getting a shop to put my exhaust together and i talked them into putting it on w/o cats and resonaters but he said i should look and find out if Z's run better with or with out that stuff on the car, if anyone knows it would be appreciated alot.

There is little HP gain from high flow and test pipe. Do us all a favor and get the high flow cats. They do work and keep the air cleaner.

As far as noise, it's between you and the flashing lights behind you.

Just get resonated testpipes to detele the cats and get a catback

dcskater676 wrote:Im getting a shop to put my exhaust together and i talked them into putting it on w/o cats and resonaters but he said i should look and find out if Z's run better with or with out that stuff on the car, if anyone knows it would be appreciated alot.

on an na I would roll with cats. they are raspy as hell without them.. sounds like a beat up honda with a loose exhaust.

Alright i really appreciate all the ideas and yea i think ill just save my self some money and keep my cats and just put the tips on. I mean its not a big upgrade in HP and i also think i already have a cat back kit on just with stock tips because the guy i bought it from messed up and orded a kit w/o knowing there was a difference between 2+2 and the norm Z. Will have pics up of before and after in about a week and thank you guys again for the helpful info.

dcskater676 wrote:Well for the 1st thing i dont want the be loud at all i want a nice clean sound and im going with 2.25 pipes, he said(exhaust shop) that 2.25 is what would run nice. So you guys think i should put my HKS tips on and be done? Also the extra HP i would gain from doing that wouldnt be worth it right?

Do yourself a favor, find a custom exhaust shop that bends their own aircraft TI tubing and have them do a full cat-forward exhaust for your NA- hi-flow Magnaflow cats, resonators, and stainless (non-polished for less cost) mufflers with tips of your choice.My system on my NA is all completely guaranteed for life, and they will mate the system to headers when/if I do it for no extra cost over the $1,000 I paid for it.I've been in and out of the shop 3 times getting the sound just right, all at no extra cost or trouble.

My exhaust system now sounds GREAT- low and beefy at idle, and barely louder until WOT and even then it still barely gets very loud at 5,000 RPM+.Best of all it has helped engine temps as well as cabin temps (hot plugged old cats), and the engine pulls smoother with a TAD more power...you won't see much power from hi-flow until you're running over 300HP in an NA.So, it not only works well but also sounds really good...no living with whatever the unheard system you buy online actually sounds like on YOUR car.

Going this route also easily beats the $1,200+ price tag (and quality!) and trouble installing a bolt together setup off the 'net or otherwise, since it is installed and guaranteed for life plus you get to tune the sound to your liking with different mufflers or resonator/no resonator...a no-brainer in my book.

Hope this helps!

DCaff300ZX wrote:
...you won't see much power from hi-flow until you're running over 300HP in an NA.!

has such a thing ever existed?

Z31toZ32 wrote: has such a thing ever existed?

I hear in heaven they have NA Z's that make 10,000hp at the wheels with no emissions and never need to be refueled. We don't live in heaven.

With any NA car you do NOT want back pressure so resonated testpipes and a catback would be your best bet

NissanFairladyZ32 wrote:With any NA car you do NOT want back pressure so resonated testpipes and a catback would be your best bet

This is true, but a NA Z hardly has issues with backpressure.

Z31toZ32 wrote: has such a thing ever existed?

Sure...have you seen the Escort Racing NA Z with the ITB's?Rated at 500 HP, no forced induction...

DCaff300ZX wrote:
Sure...have you seen the Escort Racing NA Z with the ITB's?Rated at 500 HP, no forced induction...

lol no way how would he be getting those numbers?

what about a tt. what do you guys recommend as for exhaust set up?

3" piping with resonated testpipes/high flow cats and an x-pipe, with Sebring mufflers.

does that mean i have to get 3'' down pipe just so they're all the same size from front to back? how does people usually set up theirs?

My n/a is not rapsy and I have no cats. sz exhaust with hks resonated hpipe, resonated test pipes and headers. All 2.5" there was a noticible difference with the headers and test pipes and again when I added the catback. Probably not much hp wise given its a n/a but it does rev noticibly quicker.