All parts have 3,000 miles or less
VMP Twin 67mm TB with electronics $550 OBO. SOLD!
ATI 15% lower $450 OBO SOLD!
JLT 123mm Intake $250 OBO. SOLD!
JLT resonator delete $65 OBO. SOLD!
Brisk GR12S silver racing plugs(~1500 miles) $45 OBO
Lethal off road H-pipe $300 OBO. SOLD...
Yep, looks like it fits all GT500's. Here's the link to this part on Billet Pro Shop's website... https://www.billetproshop.com/product/bps-auxiliary-idler-kit-shelby-gt500/
It could potentially help idling depending on how low your vacuum is at idle. Either way it's definitely a good idea to have one of these if you're running aftermarket cams.