That is the factory Blow off valve. Its all there all the vaccum piping is metal and underneath. As for needing it I have plugged mine off and gotten a aftermarket one because the factory ones are known to leak. As for the warm up how much warmer is it getting mine stays a constant through all driveing ranges and are you still running the stock hydro fan or a electric?
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1987 supra NA 5 speed
1JZGTE swap
Tokico Illumina 2 and Eibach springs
Tokico pillow blocks
Suspension Techniques front and rear sway bar
HKS super dragger cat-back exhaust plus test pipe
Greddy Profec B spec 2 boost controller
HKS type 1 turbo timer
Supra sport solid steel drive shaft
Walboro 255 fuel pump
JZA70 Front end mod
18" Volk Racing AV3 18x8.5 front 18x9.5 rear
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