Common faults include 02 sensors, air leaks in plenum, MAF sensor failure, you need to look under the car to see if any damage to exhaust area.
Zmanalex will be along..
These FINS are actually known as VORTEX DIFFUSERS standard on EVO FQ-MRs
Straightens out the air flow, to stop it billowing around the rear of the car, causing Drag.
While out walking the dog, 2 passed me on BRIGHTON ROAD
1. Import Gunmetal 53 plate
2. UK Gunmetal 06 plate with NISMO V2 Spoiler I think, and bumper
Was it you??
Jerry
I now park mine Not on my drive, But behind the gates of my drive!
Last year My Type-R had its JDM wind deflectors stolen off it on my drive! There were tools left around the wheels too where they tried to get my ROTA TORQUES.
Jerry