The sidepipes are pre-production parts. The production parts look quite a bit different and do not hang so low. The press photos show the same pre-production hardware (production parts weren't available when the show cars were built.) This sometimes happens on show cars. Take a look at the pictures of 2005 show cars that were used at the unveiling in Detroit and you'll find many non-production items on that car (it didn't have a hood liner, the model of 18" tire shown were never used in production, grille honeycomb is wide open, etc...)

Removing the plates in the sidepipes does indeed result in a backpressure reduction. I do not know the power improvement, though. I'm sure someone will have a car on the dyno the first week they are in customer hands and will let everyone know

 

I'm glad the production parts don't hang so low but I'm bummed these aren't the correct tail pipes. Good to hear there's a performance gain from uncorking the side pipes otherwise what's the point? It might only be a 5 hp gain but I'll take it. I saw your most recent video, got any more coming?

 

@ s197ford, any idea if/when any aftermarket company or FRPP is going to make electric dump valves for the exhaust?

 

Looks good, thanks for the pics and commentary.

Hopefully I can get a jack on the LCA mounting bracket without smashing the sidepipe...

But sounds like we will have to wait and see what the production design is and where it routes to.

SO ANXIOUS!!!!!!!!!!

 

I expect some interesting "I went to the &^$%&$ mechanic for an oil change and guess what they did!" stories to be posted in the near future...

 

Looks like they're lifting from the pinch weld. I've jacked my GT500 from there no less than a couple hundred times and it's 400 lbs heavier than the Boss.

 

http://www.metro-lifts.com/4p8k-d.htm

This is my solution to the jack problem. :-)

 

Sweet. Isn't it kinda big to drag it to the track?

 

Two screen shots of the attenuation disc and tail pipe. I think this is more representative of what the tail pipe is going to look like. The third is the Boss 302R engine on the dyno. I wonder if the Boss is going to have a header similar to this one?

 

That's the standard 5.0 header.

 

I thought the Boss had a unique header?

 

No, it uses the same header. The exhaust cam, ports, and h-pipe (obviously) are different.

 

Maybe I'm thinking the 5.0 has a unique header to the 4.6.

Notice the attenuation disc look slotted so you probably just loosen the bolts and slide the disc out for track use or waking your neighbors in the morning.