The Y pipe (#17470) for Hedman shorty headers -- does it end in 3"? If not, could I easily adapt it to attach to a 3" (in&out) cat? What size cat and what kind of adaptor (something I could get at a local parts store?) would I need?

Also, are the non-AIR Hedmans (#68470) ready for an O2 sensor to plug in, or would I be drilling this myself?

[Sorry to bug everyone... sales reps don't know ***t sometimes, so I wanted to check with people who do]

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Joel Geerling
Red 91 Formula, 305 TBI
Edelbrock 14x3 open element
TBI 1/2" spacer
Hypertech street chip
Crank/Alt Pulleys
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Exhaust is next!

 

You'd have to drill it and it does end in 3 in. The one my brother got was oval though because of the L69 cat system.

 

I have those same parts on my SC. The y-pipe outlet is 2½" but they include an adapter and clamps to hook up to a 3" system. The headers will have to be drilled and a bung welded in place.

Pete

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Pete's Place
HiOutput Tech Page

83 SC..former V6...now 216+k mile LG4/5-speed.. 14.891@95.54

 

Did you do the drilling/welding yourself? If so, how hard was it? Where did you get the O2 sensor bung?

If not, how much did it cost you to have it done?

I don't have the gear or the knowhow to do the welding part...

 

I just showed up to the exhaust shop with the bung and they drilled and welded it for me. I don't know how much that part was, but it wasn't anything compared to the labor for fabbing a custom exhaust.

 

Would the 2.5" to 3" adapter on the y-pipe be a very big restriction?

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Brady
"I see myself as a huge fiery comet, a shooting star. Everyone stops, points up and gasps "Oh look at that!" Then- whoosh, and I'm gone...and they'll never see anything like it ever again... and they won't be able to forget me- ever."~Jim Morrison