RSRagtop

I bought a set of 350 TPI manifolds ( supposed to be 89's )off of eBay recently, soon after a saw a L69 car in the junkyard. Will the H.O. y-pipe bolt up to the TPI manifolds, I heard the outlets are the same size? What size cat did the H.O. cars come with?

JamesC

iTrader: (5)

The only difference between the TPI manifolds and the L69 manifolds is that the latter has a heat stove on the driver's side. The L69 y-pipe will bolt up, though you'll either have a spacer or an EFE valve between manifold and y-pipe on the passenger side. The stock cat is a four-bolt design, both in and out. If you can, get the y-pipe, cat (could be good), and intermediate pipe. I did the swap onto a slightly modified LG4. Damn nice mod on the cheap, $68.

JamesC

RSRagtop

They junkyard that car is in does not allow cats to be sold. I don't know if they would just give it to me, probably not though. I don't want to sound like an idiot, but whats an EFE valve? I have never heard of it or a spacer being in the cars. I don't think my LO3 has either one, but it would be too small anyway. Should the junkyard car have one? I also have a 3" Hooker I-pipe so I don't need the junyard one.

JamesC

iTrader: (5)

If you have a carbed car, the car has an Early Fuel Evaporation valve between y-pipe and manifold (the butterfly valve closes on cold start and shifts exhaust under the intake to warm things up more quickly). The TPI has a spacer (in place of the EFE valve). I'll give you the spacer, should you need one, for postage.

JamesC

RSRagtop

Thanks going to the yard tomorrow to take a look at the pipe.