Does anybody know what the fittings on the tubes for cylinders 1&2 are for???? You can just see them in the pic below. They are not for the AIR system or an O2 sensor. BTW these are on a 93 chevy C1500. Not quite a thirdgen.....but alot of you guys use SLP's parts.

 

Actually I think those tubes are for the AIR. On all the newer motors they dont use individual air tubes per cylinder. It just dumps into one cylinder on each side. Take a look at your stock manifolds and see what ya have.

------------------
86 Sport Coupe
LG4 Auto
Mods
PAW headers/ y-pipe Dynomax Super Converter (not done yet for exhaust)
Edelbrock Open element air filter
L69 ECM
Moog Variable rate rear springs
Black Iroc Interior
Kenwood 120 watt head, Kenwood 6x9's jensen 4x6's rampage 100 watt amp to 6x9's

Future Mods
Carter AFB 625
Holley intake
Accel HEI Dist
Dynomax Bullet
Holley fuel Pump
Chrome dress up
And sooooo much more, it'll never end.


It isnt breaking the law........till you get caught.

 

The stock manifolds do not have any fittings on them, the truck came non-AIR from the factory.

 

Then just plug those fittings, as they are used for trucks that have AIR from the factory.

------------------
1991 Camaro Z28
5.7L 5-Speed (originally 305)
13.23 @ 107.62 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Webmaster: SoCal F-Bodies
-=ICON Motorsports=-

 

Didn't think I would need them...just wanted to be sure. One more question. Does anybody know what size/type threads these things would be???? My truck came with out the AIR system....I have nothing to compare them to.

BTW: I have already tried several pipe plugs, but nothing fits.