Billy Boat Downpipe install.
PROS: excellent quality, good welds, clean transitions.
CONS: didnt bolt up to stock catback without modification.
Can bring it back stock at any time, as i didnt alter any stock components.
Box was excellent and really high end:
Here you can compare the 42dd downpipe to the BB downpipe side by side. Notice how the BB looks too long... more on that later. Note the better positioning of the holes on the BB so you can retain your two stock O2 sensor clips:
Especially note the transitions at the flange. The 42dd has a pipe seam visible, the BB is the smoothest I have ever seen. Looks like its all one piece:
Close up of the BB head:
Close up of 42dd head:
Showing clearances, no problems here. I had to bend a piece of sheilding which bent easily, as this pipe is a more direct path than most.
To the rear piece. The adapter they sent:
The pipe was way too long, so I made the decision to cut it:
Just about 2.5" to cut. CORRECTION: 2" is the perfect cut.
Then you can see how it all works. The adapter goes over the BB end, and also over the stock catback end. The stock cat back was not touched or altered. It is REALLY hard to get it all together, as you have to push your catback back at least 1.5" so it can slip into that fitting.
This pic just shows that I am able to use both my stock O2 sensor wire clips now:
Installed, straight down the middle:
Finally, my 42dd downpipe which I think I have decided to sell locally.
Not much louder, maybe very slight. Tone seems cleaner but it could be my imagination. Enjoy the feel of it, not really a difference in power and there shouldnt be. I think this BB sounds a tad cleaner on the stock catback if that is possible.