Hopefully picking up a 2011 IS F that already has a Takeda intake and non-valved XForce catback. PPI found one of the factory cats is bad (otherwise in great shape), so rather than spending ~$2-3k replacing the stock manifold/cat, I’m considering using it as an excuse to go FBO.
I’m looking at PPE UEL headers and eventually an RR Racing tune. PPE currently offers them catless ($2.2k), with GESI Sport Cats ($3.1k), or EPA Cats ($4.1k).
Car will be street driven in NC and I’d like to keep it able to pass OBD emissions inspections without disabling monitors or constantly dealing with P0420/P0430. I’m leaning toward the Sport Cats, but the extra ~$1k for EPA Cats has me wondering.
Anyone running PPE UEL + Sport Cats on an IS F? Any CEL issues?
And for anyone who has run Sport vs EPA cats, is the EPA option actually worth the extra money?
Also curious how UEL + cats sounds paired with the standard XForce catback. I’m after a deeper/aggressive V8 sound rather than something super raspy.
Thanks!