Does anyone happen to know the diameter of the exhaust manifold collector?

I am trying to order the correct diameter inlet catalytic converters. I was wondering if someone had already replaced their cats, so I could use the same diameter.

My plan is to place a 3" custom exhaust starting with Magnaflow cats---to an x-pipe---to magnaflow mufflers---then bore/weld the stock tips back on the exhaust, so it appears stock.

If no one knows, I will just jack up the car this weekend and find out. Just wondering if someone already has the info.

I just received my service manual on disc, and was surprised that I could not find this information on the disc!!!

---Thanks,
Mike

 

I just measured my stock cats at the inlet side. I put on a set of Hi-Flow Crawfords over the weekend. Anyway the inlet side of the cat measures 2.25". Hope this helps.

Lou

 

its ok to go from smaller to bigger...

just not bigger to smaller...

the stock manifold might be 2" if lucky.. they tiny...