Billy Boat Exhaust, Top Notch Quality!
Le Mans Master
Joined: May 2008
Posts: 9,063
Likes: 2,736
2022 C3 of the Year Finalist - Modified
To Billy Boat…….if you could offer a complete mandrel bent exhaust system that would actually FIT a C3 Corvette…….and I mean FIT without bending and cutting….you would be the FIRST. I have tried Pypes, aMagnaflow and Stainlessworks and None of them fit properly…and all three did nothing but makes excuses. it’s Total BS.
Thread Starter
Premium Supporting Vendor
Joined: May 2016
Posts: 322
Likes: 73
From: Mooresville, NC
To Billy Boat…….if you could offer a complete mandrel bent exhaust system that would actually FIT a C3 Corvette…….and I mean FIT without bending and cutting….you would be the FIRST. I have tried Pypes, aMagnaflow and Stainlessworks and None of them fit properly…and all three did nothing but makes excuses. it’s Total BS.
Racer
Joined: Jul 2018
Posts: 411
Likes: 232
From: central Florida
2023 C3 of the Year Finalist - Modified
2020 C3 of the Year Finalist - Modified
2019 C3 of Year Finalist (track prepared)
Where were you guys 2 years ago? This would have saved me a LOT of work. 
Once a C3 is lowered, things go from tight to almost impossible. I'm not sure that it's possible/practical to make a production kit that will fit all the variations and production tolerances too. Automatic? T-56 Vs Muncie? There are some very significant differences in clearance there. I don't think mine would work with t-56 or automatic. I have a TKO-500
I went under the diff/Smart strut bracket with oval as it gave about 3/4" more ground clearance. X-pipe is sized cross-sectionally for 500 HP (slightly optimistic). 3 inch is tight, but it works. If I did it again, I'd transition to oval before the X-pipe for additional clearance under the seat area.
If anything off mine will help develop yours, let me know.---Ignore my lack of TIG skills. This project was my first.
Once a C3 is lowered, things go from tight to almost impossible. I'm not sure that it's possible/practical to make a production kit that will fit all the variations and production tolerances too. Automatic? T-56 Vs Muncie? There are some very significant differences in clearance there. I don't think mine would work with t-56 or automatic. I have a TKO-500I went under the diff/Smart strut bracket with oval as it gave about 3/4" more ground clearance. X-pipe is sized cross-sectionally for 500 HP (slightly optimistic). 3 inch is tight, but it works. If I did it again, I'd transition to oval before the X-pipe for additional clearance under the seat area.
If anything off mine will help develop yours, let me know.---Ignore my lack of TIG skills. This project was my first.
Thread Starter
Premium Supporting Vendor
Joined: May 2016
Posts: 322
Likes: 73
From: Mooresville, NC
Side pipes are made either for the 4" side outlet headers or the 3" side pipes for under the covers. The 4" side pipes are double insulated and will not burn you when you exit the car!
We will keep you updated on the progress of the under car system.
We will keep you updated on the progress of the under car system.
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Race Director
Joined: Mar 2016
Posts: 14,320
Likes: 8,124
From: Napa Valley California
It would be nice to have someone build a C3 exhaust system of good quality that was actually bolt on.
It would be even better if it was made to fit from just before the transmission crossmember back, because there are so many variations of headers and exhaust manifolds.
Good quality, and if it was available in 3” oval, I’d buy a set.
If I wasn’t so far away, I’d let you use my car and I’m actually shocked you don’t have a line of C3’s parking at your shop hoping to be the first.
Keep us posted!
It would be even better if it was made to fit from just before the transmission crossmember back, because there are so many variations of headers and exhaust manifolds.
Good quality, and if it was available in 3” oval, I’d buy a set.
If I wasn’t so far away, I’d let you use my car and I’m actually shocked you don’t have a line of C3’s parking at your shop hoping to be the first.
Keep us posted!
Instructor
Joined: Oct 2008
Posts: 187
Likes: 12
Received my billy boat stainless side exhaust today. they are the finest ive seen .smooth bends and the welds are perfect .nuclear grade craftmenship.I must say.Myself a welder for 50 plus years. I highly recommend them .
Safety Car
Joined: May 2004
Posts: 4,349
Likes: 1,578
From: los altos hills california
Safety Car
Joined: May 2004
Posts: 4,349
Likes: 1,578
From: los altos hills california
They are as you say. I am thinking of picking up a set of the conventional under car variety myself while they are on sale. In my case I have a z-bar and their picture of those suggests there will be plenty of clearance. There's a lot going on in your situation, I guess you've got this figured out. Looks like you've got all the 'gear'. Nothing but fun for gear heads, hey!
Thanks for the picture
Thanks for the picture
Last edited by ignatz; Nov 13, 2023 at 10:22 PM.