Got my 4Runner back from the exhaust shop
It sounds so much better, especially paired with the K&N!
I do get the droning at ~2100 RPM which is unfourtnate for going around corners and stop/go traffic, and also when going 70-80MPH. But everywhere else it sounds perfect. I'm willing to bet other people wouldn't even consider what I am talking about as 'droning' at all.
Here's what my mechanic said about the headers:
- 2 studs broke off in head and had to be extracted
- Header holes not lining up with head
- Had to remove headers 4 times on drivers side to get all studs to start
- Passenger side header also had fit issues
He did the install solo to my knowledge. He opted to not put the locks on the stage 8 header bolts until after I drive it a few hundred miles and it needs to be re-torqued.
I
am getting a dreaded CEL: P0154 - O2 Sensor Circuit No Activity Detected Bank 2 Sensor 1. That's the upstream A/F sensor for the passengers side header I believe. So I don't think I need the O2 spacers, which are for downstream (as
@
4RunnerAquasport
pointed out). I'm hoping the sensor just needs to be wiggled or something.. maybe I got a bad Denso? Not sure.
Video 1 - Startup / idle sound -
YouTube
Video 2 - Phone on dash; all windows down -
YouTube
Hey
@
JONBOY345
do you have that Vibrant Resonator right before the Magnaflow muffler? How's the sound? Is it just as loud everywhere else for the most part, and the resonator gets rid of the droning? Would love your thoughts since I realized we have a pretty similar exhaust setup minus the Y-Pipe.
P.S. I sold my old cats to RRCats, $103/ea for the manifold cats and $73 for the Y-Pipe cat.
Quote:
Originally Posted by Ed_C
Excellent! The shop-fabbed will probably have smoother bends, those two listed in Rock Auto are all crinkled.
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Pictures of the welds & underside coming very soon