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  1. Runerock

    Magnaflow 23453 or Flowmaster 2010023 cat system?

    Life has got in the way. I'll get it together by spring.
  2. Runerock

    Magnaflow 23453 or Flowmaster 2010023 cat system?

    I don't want to deal with headers, so they're staying for now
  3. Runerock

    Magnaflow 23453 or Flowmaster 2010023 cat system?

    Summit and Jegs still list it
  4. Runerock

    Magnaflow 23453 or Flowmaster 2010023 cat system?

    Have to? No. I looked at that and for a few hundred more I'd rather pollute less and be able to use the warranty on my GM Performance motor.
  5. Runerock

    Magnaflow 23453 or Flowmaster 2010023 cat system?

    Due to the overwhelming response, I read as many reviews on cats and cat systems as I could find. I ordered the Flowmaster system to go with the Gibson cat-back. I'll try to post an update after the install or after the install plus some programming/turning.
  6. Runerock

    Magnaflow 23453 or Flowmaster 2010023 cat system?

    Vitals: 1999 Tahoe 2door HT383E engine I've been looking at getting a better flowing system from the manifolds back. I'm fairly well decided to use the Gibson 615501 for the cat back, but can't decide on what cat system to put in between the manifolds and the Gibson. The manifolds are staying...
  7. Runerock

    NP246 6 bolt to 4L60E 4 bolt

    I've got the proper transfer case adapter for the new old style transmission coming thru Evil Bay. I hope this resolves this issue for me. I'll find out next weekend, when I have time for it. Providing the part arrives
  8. Runerock

    NP246 6 bolt to 4L60E 4 bolt

    Ok it looks to me like I need this piece, but with only 4 holes on the transmission side. Does Adv Adapters make one? Their site is tough to search and sometimes their descriptions don't fill me with confidence. If any body knows the part number that would be awesome. Hopefully they respond to...
  9. Runerock

    NP246 6 bolt to 4L60E 4 bolt

    The old one has the bellhousing go all the way around and so did most gmt400s at the salvage.
  10. Runerock

    NP246 6 bolt to 4L60E 4 bolt

    So this is what I'm working with. Can I still use that plate, just not using the other 2 holes. Need to finish pulling it today and see where I'm at I guess. The whole bellhousing thing has me questioning it all I suppose.
  11. Runerock

    NP246 6 bolt to 4L60E 4 bolt

    Thinking about it, I'm just assuming they had 6 bolts between transfer case and transmission, but most of the gmt400s there had bellhousings like mine with full housings and flat shields.
  12. Runerock

    NP246 6 bolt to 4L60E 4 bolt

    I have some inquires out on possible adapters and will look into your suggestions. Neither the old or new bellhousing is removable. Looking around at the salvage yard almost all the 4L60Es had my originals style of 6 bolts for attaching and flat shields. I'm going to head back there tomorrow and...
  13. Runerock

    NP246 6 bolt to 4L60E 4 bolt

    Hi. So I have a 99 2dr Tahoe 4X4 that is getting a new transmission. Summit sold me one that they swore was the correct one after I asked why the bell housing was different. I ended up going to a yard and pulling the correct dust shield cover. My old one just has a plate and a bell housing that...
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