I have TOG headers and all went well.
The included downpipe with flex coupler actually lined up perfectly with the OEM catalytic converter once the factory downpipe and flange was removed. I was able to hold up the converter with a coat hanger which worked well to drive it to the muffler shop where I had a high flow cat installed.
On the TOGs it seamed the downpipe end sits a little lower than it does on a GP. In order to tuck the rest of the exhaust up into the tunnel where it is stock, the guy took some mandrel bent stainless steel pipe and cut in into four sections longer on side than the other. He fitted them on the car, tack welded them into place to make a smooth flowing transition section and finished it with a TIG welder.
Most people would be happy with either the SLP or TOGs though the SLP have a slip joint connection with T-bolts on the cross-over that tend to leak versus the TOGs with flanges and donuts. Most people agree the flex coupler on the TOGs is better than the SLP which many say emits audible ticking.
Hope that helps...
40th Anniversary Edition
13.074 @ 106.579
FWI | 4" Intake | LQ4 | N* TB | Custom TB Adaptor | Ported SC | 2.8" Pulley | Custom Intercooler | Ported LIM | Custom Ported Heads | 105# CC Springs | Modded Retainers | Oil Restricted Push Rods | CC OE-R Lifters | XP Hot Cam | TOG | HF Cat | 2800 ST | 3.29 Gears | DHP PowrTuner | LC-1 Wideband | Engine now retired |