1988-1991 Honda CRX 1.5 Alternate Intake Manifold
#37465 from John Gaydos · Not recommended · Minutes (2025-02 Fastrack)
The differences in the intake manifold, throttle body, and injectors (both placement and quantity) between the '88-91 CRX DX
and Si model's are significant, and a majority of the reasoning for why one is in HP and the other is in FP. Allowing the HP '88-91
CRX DX to run the FP '88-91 CRX Si's IM, TB, & injectors would not only be outside of class philosophy, but it would also result in
a significant performance gain for a spec line that is proven to be competitive in HP. This allowance is not recommended.