These were posted on MyMonte and the guy claims that they'll work for Bonnevilles. Assuming they are Series 2 headers.
http://www.mymonte.com/discussion/vi...r=asc&start=40

I think they'll be available through http://www.donkeypunchperformance.com/

Those would be pretty cool to add. I'd be interested to hear if Bonneville fitment has been verified.

3 other header manufacturers have already been verified and proven on Bvilles. You have options.

Do you have a recommendation among the three manufacturers?

I own 2 Series 1 L67'*, so I'm not sure.

You'll have to search for topics and see what'* most prevalent.

Try searching for 'Header' or Headers in the Performance and Brainstorming section.

SLP and TheOtherGuy'*(TOGS) are 2 of them

The Other Guys (TOG) has the best headers out for the 3800. They also have the best warranty. On a L36 that has mild mods I'd get PEMs, headers will cause you to lose torque.

TOGs > SLP > SS

headers are nice and all but if your not runnin or planing on runnin under 12 seconds wouldnt PEM do the same thing???

Matter of opinion I suppose. TOGS are more expensive, TOGS have flange style connectors that are hard to seal and leak, TOGS have issues with Trans dipstick placement on some models, TOGS have issues with sway bars hitting in reverse on some models. SLP'* sometimes have an annoying tick due to a slightly thinner flexpipe wall and slightly smaller primaries but have not fitment or sealing issues. *&* I have not had any experience with.

Do some research and get the best bang for your buck. If you plan on eventually getting cammed I highly recommend headers over PEMS.

Some of the things I have read: SLP'* almost always have an annoying tick. This sometimes gives false KR. SLP'* are harder to install. SLP'* base caoting rusts quicker. *&* headers quality is terrible and they are more geared torward n/a or low end.
Some of the things I know for sure:( I have TOG'*) The quality is excellent, I bent my trans dip stick out of the way easily, I had no problems sealing even with them being installed on another car before.
For both TOG'* and SLP'*, you'll have to grind down the from tranny damper/mount if you have one(95-99?)