C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Front Y Pipe Question

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Old Jul 25, 2002 | 12:35 AM
  #1  
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Default Front Y Pipe Question

Does anyone ahave any experience with the Dynomax front Y pipe and catalytic converter combo from the Eckler's catalog? I think one of my pre-cats is clogged and I just wanted to go on and get rid of them. Should I buy this or just buy a new cat and have a muffler shop make me a new Y pipe? :yesnod:
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Old Jul 25, 2002 | 12:58 AM
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Default Re: Front Y Pipe Question (Lexdog)

I don't have experience with that setup. But I DO have experience with the setup from Mid-America. I got the S.S. 2½" precatless front y-pipe for $190, along with a Random Tech High Flow cat (got used for $90), works like a champ! Made the car sound a WHOLE lot meaner! I also have the Dynomax rear y-pipe, (The one with the crossover tube) I really like it. :D
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Old Jul 25, 2002 | 01:03 AM
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Default Re: Front Y Pipe Question (Lexdog)

I bought and recently installed the front Y pipe w/cats from Mid America ($320) shipped to Ca. Works well, but the flange bolts required I use washers, the holes in the flanges were larger than the stock '91. :hat
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Old Jul 25, 2002 | 01:22 AM
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Default Re: Front Y Pipe Question (Vettman 1)

I bought and installed that package from Ecklers for around $250 I think. Everything bolted up just fine :yesnod: I've had it on the car for about 6 months now.
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Old Jul 25, 2002 | 07:25 AM
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Default Re: Front Y Pipe Question (Lexdog)

I used them both with no problem. I had someone else do the install for me, but as far as I know it went well. I am happy with it. :D
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Old Jul 25, 2002 | 08:12 AM
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Default Re: Front Y Pipe Question (joecaver)

Thanks for the replys guys. I think I might go ahead and purchase that set up and I can always change the cat later on. I have a Flow Master Cat-Back exhaust already and I want a meaner and louder sound. I live and PA and we have emissions test here. If I go with this setup and get rid of the pre-cats will I still be able to pass my emissions? I should but I'm not sure. :yesnod:
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Old Jul 25, 2002 | 01:46 PM
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Default Re: Front Y Pipe Question (Lexdog)

Others have said they passed without the precats and a new/good main cat.
You can just bang the guts out of the precats and put the pipe back on.
It takes about a 3ft long piece of old 1/2inch pipe to bend up to get around the bend, a hammer and about 15min a side of hammering.
Those precats will come apart and block the main cat sometimes.
That's the cheap way to do it. You won't have problems with inspections that worry about how things look either.

JS
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Old Jul 25, 2002 | 01:50 PM
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Default Re: Front Y Pipe Question (Lexdog)

If I go with this setup and get rid of the pre-cats will I still be able to pass my emissions? I should but I'm not sure. :yesnod:
I just passed CA emission with the cat-less front Y and 3 way converter (bought from Ecklers).
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Old Jul 25, 2002 | 02:58 PM
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Default Re: Front Y Pipe Question (Lexdog)

Thanks for the replys guys. I think I might go ahead and purchase that set up and I can always change the cat later on. I have a Flow Master Cat-Back exhaust already and I want a meaner and louder sound. I live and PA and we have emissions test here. If I go with this setup and get rid of the pre-cats will I still be able to pass my emissions? I should but I'm not sure. :yesnod:
I passed emissions testing in Ga. with no problem. The Ecklers ad says that the setup is good for emissions testing in all states.
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Old Jul 25, 2002 | 03:24 PM
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Default Re: Front Y Pipe Question (Lexdog)

The MAD front Y arrived a little distorted so I returned it and had Mufflex in Trenton, NJ custom build a 2 1/2" SS front Y. They also installed my RT cat and custom fit (cut, welded, etc.) my TPIS cat-back system; all for about $300 and in a little over 3hrs.

You could try one of the Ys from a mag but I sugget a good custom exhaust shop if available.

With my current exhaust system and all smog stuff in tact (except the missing pre-cats) my Vette easily passed Ohio's E-check dyno sniffer last month. And the setup is 49-state emissions legal, sorry you CA guys.
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Old Jul 25, 2002 | 07:21 PM
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Default Re: Front Y Pipe Question (Lexdog)

I just did this a few weeks back (eklers kit).
Hardest part for me was putting the car up on pin jacks.
Bolted right in and fit was good.
Recommend you buy the cat hook up kit, used a small coupler in it to hook up the air pipe to the old one.
A small copper pipe type pipe cutter comes in handy to cut air pipe clean, also.

OK quality, but the bends are OEM style crimps.
I also welded in a oxygen sensor fitting on the pass side for a wideband fuel meter someday in the future.
Change to the sound is great, cleaner sound, much less muffled.
Converter looks very open and high flow, lots of light compared to the stock looking through it.

Also will need some long bolts, washers and nuts because the cat flange isn't taped for the stock bolts. Just thru holes





[Modified by SuperL98, 5:32 PM 7/25/2002]
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