Does your car sputter at low rpm?

 

Are idle issues a thing with aftermarket headers? I have intermittent rough idle in my car after adding some mods a year ago, one of them being the Z1 headers.

 

No, i never had idle issues. There could be idle issues if you didn’t seal the headers onto the motor properly, such as a faulty gasket or studs not torqued. Could be the Upstream o2 / AFR sensor unplugged or damaged, or not screwed in all the way. Or an exhaust leak between your header and test pipe.