I have a 4-1 header that has two pieces. The one largest piece stops right after the upstream 02. Which is right under the engine. Is it ok to run open header? Any worry about burning valves? I remember reading about burning valves if you run open header? Just hoping to get some input, thx guys.
Nick
97RS

turbo8u> shut your SUCK

I ran an open exhaust manifold for a long time with no ill effects... However, when Idling at a stop light with the windows down, you can smell it, haha.

Probably not good for exhaust to exit right under the engine. Also can fill the inside of car with CO. CO can kill... my uncle died of Carbon Monoxide poisoning.

Yeah - better safe than sorry...or dead. Dump it out on the side of the car at least.


95 Eclipse RS : 5 speed
15.901 @ 88.34mph
Jeep TB writeup - http://www.dimensia.com:81/jimbo/JeepTBfor2gnt.html

just take small wiffs of the CO and eventually, you'll build a fuggin immunity.... no probs... or u b dead.

When I first installed mine, I ran it for one day on open header due to a 2nd 02 opening that needed to be plugged up. The idle was fine, but The car was loud as hell; sounded like a real loud drag car! Scared alot of people on the road..