Whats this for?
Thread Starter
Junior Member
Joined: Mar 2014
Posts: 11
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From: Menifee, Ca
Car: 91 camaro
Engine: 305 L03
Whats this for?
I bought a 91 rs 305 tbi camaro, and the previous owner seem to have a habit for breaking hose lines. First the canister solenoid to tbi, and then these two can you help me so i can buy the parts needed. Any help is totally appreciated.


Supreme Member
iTrader: (-3)
Joined: Dec 2012
Posts: 1,184
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Car: 1991 firebird
Engine: TBI 305 (built)
Transmission: T5
Axle/Gears: 4.10
91' bird 305 TBI T-5, trick flow heads, 4.10 gears, full UMI setup, track times coming soon!
Re: Whats this for?
the big box is the diverter valve for the emissions. keep it if you have emissions inspections. the little valve on the bottom is the heater valve for the coolant. keep that.



