We have been working with international exhaust manufactures and retailers as an OEM manufacturer for several years.
“GO-Sheng” is our brand new brand since 2014.The characteristics of GOS system are base on our several years of experience on OEM products.
We transforming vehicles and giving them a new sense of purpose. This Audi A5, for instance, got the GOS F1 exhaust&intake system installed. Full stainless steel valvetronic exhaust system providing an Ironman-esque boost to the vehicle's performance. Smoother and increased expulsion of exhaust fumes accelerate the cycle, pushing hp and torque way up. Unobstructed flow and the pinging off the stainless steel create a full and sporty sound, that'll have people turn their heads and gasping.
Stainless Steel System: SUS304 Stainless Steel | Flawless TIG Weld | Durability Unquestioned | Lighter Than Stock | Deep/Full Exhaust Note

ADVANCED VALVETRONIC SYSTEM
Valves Opened (Race Mode): Improved Low Level Tone | Amplified Mid-Range Note | Increased High Pitch Acoustic | Sharper/Crisper Sound | Noticeable BHP Gain | Low&Mid Range Torque Upgrade | Responsiveness of Throttle | Improved Efficiency | Unobstructed Exhaust Flow
Valves Closed (Street Mode): Maintain Low Profile | Everyday Driving


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We are considering expanding our products to new markets
and we would appreciate you assistance.
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mutually acceptable business relationship.
Contact us for further details.

 

Was there an AM intake that was used to film the exhaust video? If yes, which intake was it.

Can you post some pre & post dyno graphs pertaining to this exact exhaust & car? As well as naming any other After Market power adders (if any) that may be on the car, so that the baseline HP/TQ numbers are clear.
As well as difference is fuel consumption from basic city/highway mpg's, to what can be expected from average commuter's habits. As well as a fun "Spirited" driving session, or day at the track where there may be on/off aggressive driving intervals.

What is the weight of this specific exhaust for the A5, vs the OEM exhaust?

Does the system include a "high flow" cat? If so, what brand, and is this exhaust system legal in the continental US?

Is then entire length of the exhaust system the T304/SUS304 Stainless? Including flange metal type?

Does the exhaust have any options of single tip, or is it dual tip per exiting side?

Does the exhaust fit OEM S5 rear bumper valances? As well, are there any rear bumper types on the A5 OEM or aftermarket that may need "modified" for this exhaust to sit properly?

Are there choices in the tip types (oval, circular, trap, etc, colors, finishes, and are all of the edges to the tips a clean cut edge only? Or do any of your exhaust tips that are available have any tips that are dual walled, or "rolled/rounded" tips?

How is the fitment on an A5 that came OEM with single outlet style exhaust? Are there any sections under the car that would require modification in the form of needing "hangers" or mounting hardware that requires welding, or holes to be drilled in order to be installed that is not already on the Audi A5? or does the proper installation equipment come complete with your exhaust systems?

And my last dumb question.... Does the exhaust system flanges match up perfectly in fitment of the flanges? Are gaskets included in required sections, and what grade hardware is sent with your exhaust systems when purchased? Including any kind of basic form of paper instructions on removal of OEM exhaust, and including prep installation steps for your exhaust, up to including what tools are required at minimum?

Can the average swingin d*ck do this in his garage with a standard set of jack & jackstands, hand tools, over the course of a day or weekend?

Thanks!

 

And Oh yeah, it looks like you guys did a really nice clean job on the system as far as can be seen on the car that's in the photos. It looks really nice. Almost makes you wish the world could see more than just the tips! lol

My reason for so many questions up front to be honest are simply meant to be the things people don't take into consideration immediately. I've mod'ed my fair share of cars, and have enjoyed as much of the experiences as much as I equally hated others, heh....

I've dropped good cash on both "top of the line" parts, as well as spending good cash on items claiming "quality, performance, function, improved form..." blah blah on and on.

But each time it came down to two things.
1. Ease of install
2. Did the manufacturer & parts stand up to their claims

That was a portion behind a majority of my questions. As right outta the gates, you can see it's a dual exit system for a single header car. Which ironically the 2015 Audi A5's that I just bought a pair of....both have the single side outlet exhaust.

I've yet to tear into either one of them to determine if I'll stick with the single side exhaust. Or go the route of the S5 OEM rear bumper.... or what ever After Market options I've yet to find, like, while keeping the car tasteful and not have **** "slapped together" or "flapping in the wind", or worse.... requiring a headaches worth of modification to facilitate what should have been a simple mod/improvement.

 

Got your PM, thanks for the reply. Would it be possible for you guys to PM me the pricing on this exhaust, and for the intake as well? Is the intake ABS, or aluminum?

Thanks....