I think it's terrible value, it should be half that price IMO. And I'm known as someone who will unironically suggest the GTIII-SS on the RB26 if you have very specific requirements. The GCG RB25DET "hybrid turbo" is 1/3rd the cost of this GTIII-RS kit and sounds like it should fit with zero modifications. Talk to Hypergear as well, maybe they can do something that fits your requirements.
Oh that's a Haltech, however an ECU just commands fuel, spark based on the inputs it receives.
So yeah, 30 to 35° of timing advance isn't out of the ordinary.
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