Doug Thorley, now CARB legal??

[thegame7]

For the longest time I thought OEM was the only way to get replacement exhaust manifolds but now it looks like Thorleys shorty headers are legal in CA? Provided you use the factory cat and O2 sensor locations. See below...

2005-2009 Toyota 4Runner / Lexus GX470 4.7L Short Tube Headers

https://ww2.arb.ca.gov/sites/default/files/aftermarket/devices/eo/d-540-7.pdf

Pretty steep price increase for them ($1050 for the pair) but still legit if true!

 

[Driftwood71]

Interesting find, looks legitimate to me. Now how to convince them to do the long tube headers next....

 

[Agennesic]

That's interesting...

 

[thegame7]

Interesting find, looks legitimate to me. Now how to convince them to do the long tube headers next....

Long tubes will be impossible because it would eliminate that front cat on both sides. Trust me though, I’m with you