x8xViperx6x

iTrader: (1)

I plan on running open header for awhile when I get them. I just want to know in advanced if it will damage ANYTHING? WOT?

Just curious before I go and break something..

NJHK

You won't break anything, it'll just be loud as dirt and you'll lose power.

HackAbuse

IT will be VERY loud

Red2.4SS

No damage, but it will throw a P0420 code for not having a cat.

poppagun

it sounds sweet when i put my cat back i ran it open header and down pipe and it sounds like a race car.

senior_brown

it'll get rediculously loud dude

tcolli17

You probably will want to put on the exhaust after the first cop that you come across gives you a noise polution ticket.

jimbos'ss

iTrader: (2)

this is just what someone told me once when i was doing exhaust work to my z-28 years ago and i only had the headers on for a week. my autoshop teacher told me i'd burn the exhaust valves, and that i was losing alot of low end torque,which was true.so i took his word for it and finished my exhaust. i don't know if he was right but everything else he said was....

06cobaltls

i want a sound clip of this

NJHK

Did he explain how that would happen? I've never heard that one...

nomoreavril

whats open header?

NJHK

Where your exhaust system only involves your exhaust manifold (aka header) and the rest of it is either removed or disconnected from the manifold, basically making a huge exhaust leak.

nomoreavril

lol thats kindof lame imo.

NJHK

He said it will be for a short period of time. I don't think he's doing it for performance or anything.

FYI: Open Downpipe FTW! (sorry, I had to)

nomoreavril

do you already have an exhaust on there? i could understand maybe not wanting to put stock exhaust back on til you got one on there but if you have an exhaust then why just disconnect it:P not trying to hate..

Blown 4-banger

If you run an open header for an extended period of time...
1. You'll need a hearing aid in a week or two
2. You'll run a high risk of warping an exhaust valve.

NJHK

Could you explain how #2 happends? I've never really heard of this...

06REDSS/SC

I have been told this also, but don't know how it happens. Maybe something with how the exhaust pulses

06cobaltls

maybe without any backpressure the valve wont close fast enough and cause it to slam into the valve train as it comes up slow, but dont take my word for it

06cobaltls

oh an i would make sure that nothing is close enough to catch fire if it pops and cracks, or backfires

x8xViperx6x

iTrader: (1)

Yes this will be ONLY for a short period just long enough to get my exhaust bolted on, I was just curious on the damage it would do just in case I couldnt get my exhaust on for about a week or so. Ive helped bolt on headers on IonNinja's Ion and have heard them open, its crazy loud, sounds sweet for a while but not for everyday use, thats IMO. Anyways thank you all for the help.

bdwarr6

I am running a downpipe, and factory resinator and its ******* loud i hate it and wouldnt advise it, just im to lazy to weld my factory exhaust back together until i get my vibrant full exhaust

jimbos'ss

iTrader: (2)

not really that i remember , of course that was 12 years ago. another thing was occassionaly it would shoot flames out the exhaust. so that might have something to do with it. i noticed this at a gas pump no less looking at the reflection of my car just as i started it up. talk about scaring the **** out of someone.

07LSC

If it's anything like it was when I did it with my camaro the car will shake like crazy and it'll be loud as hell when your driving, I thought I was gonna go def and I didn't let it over 2000rpms. As long as you don't have any wires or anything near the opening of the header then nothing should be damaged.

SymbioteLT

Im runing my exhaust with no muffler, it still has the cat & resonator, and after the resonator its strait pipe. I like it