I don't know much about RX4s.
The only advise that I can give you is that this section does not see much traffic. Maybe a post in the Old school rotary section would be more useful.
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1986 GXL ('87 4-port NA - Haltech E8, LS2 Coils. Defined Autoworks Headers, Dual 2.5" Exhaust (Dual Superflow, dBX mufflers)
1991 Coupe (KYB AGX Shocks, Eibach lowering springs, RB exhaust, Stock and Automatic)
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