GT-40X heads

01-20-2001, 01:35 PM

I heard "in theory" that these heads will not pass the sniffer. Anyone manage to get them to pass? I plan to use these heads, but I don't want to go emissions exempt if I don't have to, because then I'll only be allowed by the state to drive my car under 5,000 miles a year. Thanx!

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'89 Notch: R134a A/C conversion, Hedman Shorties, 2.5" MAC cat-back, 3.73 gears, MAC "Racer's choice" shifter, RAM clutch, MAC quadrant & cable, MAC cold-air kit, 75mm Pro-M, 65mm TB, GT-40 intake, 24# inj, 1.72RR's, 190pump, alum. driveshaft, '95 GT spindles & Brakes, polished '99 Cobra wheels w/ 245/45/17 rubber.

Nicks5.0 · 01-20-2001, 10:12 PM

ive never heard that about the x heads. what to worry about with emissions though, is the state of tune the motor is in. you can have a "clean" cam and heads and have a shitty tune on the motor and have it fail, and you can have non emissions parts pass if you get the tune up right. i would worry about emissions with the cam you choose, not the heads. i replied to your other post about the cam, dont forget to mention that you want to pass emissions when you talk to cam tech guys. once again, good luck

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1990lx coupe, 302, gt40p heads, wolv 1087 cam, 1.7rr's, 65mm tb, 75mm maf, comp box on top of cobra lower, anderson ford pms, full exhaust, drag type susp. and 3.55's. traps 105mph

01-20-2001, 01:35 PM	#1
89NB50 Guest Posts: n/a	GT-40X heads I heard "in theory" that these heads will not pass the sniffer. Anyone manage to get them to pass? I plan to use these heads, but I don't want to go emissions exempt if I don't have to, because then I'll only be allowed by the state to drive my car under 5,000 miles a year. Thanx! ------------------ '89 Notch: R134a A/C conversion, Hedman Shorties, 2.5" MAC cat-back, 3.73 gears, MAC "Racer's choice" shifter, RAM clutch, MAC quadrant & cable, MAC cold-air kit, 75mm Pro-M, 65mm TB, GT-40 intake, 24# inj, 1.72RR's, 190pump, alum. driveshaft, '95 GT spindles & Brakes, polished '99 Cobra wheels w/ 245/45/17 rubber.

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01-20-2001, 10:12 PM	#2
Nicks5.0 Registered Member Join Date: Jun 2000 Location: Belleville Il, USA Posts: 234	ive never heard that about the x heads. what to worry about with emissions though, is the state of tune the motor is in. you can have a "clean" cam and heads and have a shitty tune on the motor and have it fail, and you can have non emissions parts pass if you get the tune up right. i would worry about emissions with the cam you choose, not the heads. i replied to your other post about the cam, dont forget to mention that you want to pass emissions when you talk to cam tech guys. once again, good luck ------------------ 1990lx coupe, 302, gt40p heads, wolv 1087 cam, 1.7rr's, 65mm tb, 75mm maf, comp box on top of cobra lower, anderson ford pms, full exhaust, drag type susp. and 3.55's. traps 105mph