Here is what we have determined what will be the definition of each stage. Turbochargers for stages, exhaust systems for plus.
Stage 1
GT2860RS
2.5" exhaust system
Stage 1+
GT2860RS
3" exhaust system
Stage 2
GTX2867R
2.5" exhaust system
Stage 2+
GTX2867R
3" exhaust system
Stage 3
HTA2868
3" exhaust system
Stage 4 (In testing phase)
HTA2868 w/Alpha cover
3" exhaust
Thank you, Tony
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