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What size 3-bolt flange is the front catalytic to y-pipe?

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Old 05-21-2014, 05:27 PM
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What size 3-bolt flange is the front catalytic to y-pipe?

Recently swapped '05 engine in my '02 and need to extend Warpspeed y-pipe flange approx. 1/4". To make things easy on myself I want to use a 3-bolt flange as a spacer to fill the void, but car is back together and I neglected to measure the flange when it was off the car.

If anyone has stock y-pipe or any other y-pipe off of their car I would appreciate if you could measure the size (bolt and or just overall size) so that I can purchase just the flange.

Thanks in advance. Much appreciated!!

Selling car to friend and would like to get things buttoned up for him before he buys.
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Old 05-22-2014, 07:05 AM
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They're pretty standard in the 2.00-2.50" inch (pipe diameter) range. It's when you go with a 3", things change a little. I'm speaking about the bolt pattern. Bole holes are also about standard across the board. I used the same bolts as were on my 2.5" on my 3". Just a through hole, vs any threading since they're typically tightened using nuts. lol
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Old 05-22-2014, 12:06 PM
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Thanks. Will just get one and git-r-dun then!

I had the Warpspeed sitting in garage for a few years and figured I'd install it during the swap since the factory y was pretty much fubar'd. Had no idea it was shorter, so now we are going with a flange "spacer" to accommodate the incorrect length.
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Old 05-22-2014, 12:18 PM
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Warpspeed has the flanges listed for sale on their site: http://warpspeedperformance.com/maxi...a_exhaust_misc

When I was there several years ago prototyping their SFCs, they had boxes of the flanges sitting around waiting for assembly. I asked for a couple and they handed me a pile of them. all have since been used, but they should have them readily available.

The steel on them is about 1/4" thick, so all you should need is one flange and one donut gasket and slap it in as a spacer.
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Old 05-22-2014, 12:26 PM
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My Warpsspeed Ypipe off the vehicle....I can measure it !!!
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Old 05-22-2014, 06:30 PM
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UPDATE: Thanks guys for the help, but no need for spacer.

Took car for a ride to get some gas in it and just get some cobwebs out of it. Got home, and apparently the engine had not settled since installing. ?!?! Anyhow, exhaust is all lined up now and was able to snug everything up. Everything fits nice and snug!

Gonna miss it. This thing get's up and goes!!

'05 VQ with 75k miles
- Vias block off
- front cats gutted
- Warpspeed y-pipe
- eBay cat-back
- Ralco Aluminum Pulley
- GAB intake mod

My buddies gonna enjoy this one...
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