5th and 6th ports
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5th and 6th ports
ok so i have an 89 GTU
and i bought an aftermarket exhaust.. i was told that the 88 and below use back pressure to open the ports and taht since i have an 89 i should be good...
but i have the tube thing on my exhaust that leads in the cat and back to the motor...
already put my exhaust on but now that tube is just dangling under my car...
and i bought an aftermarket exhaust.. i was told that the 88 and below use back pressure to open the ports and taht since i have an 89 i should be good...
but i have the tube thing on my exhaust that leads in the cat and back to the motor...
already put my exhaust on but now that tube is just dangling under my car...
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if tou are talking about the pick-up tube that on the exhaust, its there cuz you either bought an exhaust for an s4 or its there so that the exhaust will work on both s4s and s5s (more economical to produce one unit vs two diff units). as said before, block it off with a plate or weld it shut.
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ok, that line is from the air pump to the cat. if you have no cat (aka a presilencer or a testpipe or whatever you wanna call it) then you have no need for that pipe and no need for the air pump (its sole purpose is to support the cat) toss em both. for that matter, almost all your emmissions equip. is designed to support/work with the cat. if you have no cat, you can ditch them all. if you still have a cat, you need to hook that pipe back up (unless the cat is gutted of course)
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#9
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that pipe goes to the air pump. like i said, w/o a cat, your airpump is useless, just toss it. if you have no smog where you (i hope you dont cause you will NOT pass without a cat) are then delete the rest of your emmisions (EGR, ACV, etc) since there pretty useless now too.
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if you insist on keeping the pump (dunno why) just remove the line and let the pump blow right out. i dunno what would happen if you clamp it since air is constantly being blown out
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