06YarisRS's 2ZR-FE Swap 5-Door Hatchback (Automatic Transmission)

[tmontague]

Originally Posted by ArmstrongRacing

I honestly wouldn’t mess with it yet. You’re still using a stock exhaust manifold so that pipe diameter reduction after the resonator likely isn’t your biggest issue.

I’d say just bolt it all up and drive it for a while. Try to sell off your 1nz parts and recoup some money, then revisit this in the future.

Fully agree, it wont make a large difference and since you tend to like to keep the rpm's down this will keep the torque in that range.

As Tom said, revisit it down the road if need be