NemesisC5

Were all the videos done with the 5.3 engine as indicated on dyno chart at end of video?

The gains looked to be around ~15 hp/tq on the chart, is that about correct?

Did you tune out the O2 sensors with the LT's and high flow cats?

If not did you get a CEL warning light?

Is it 2.5" tubing?

Looks and sounds great especially with the LT's

NemesisC5

I like it, nothing like the finished formal product but it sounded good enough to have a warm fuzzy feeling and want more. Glad we bugged em

Vortec350ss

iTrader: (20)

Sounds great! What diameter is the dual pipe of the cat back?

Stainless Works

All of our R&D was done on the 5.3

That's definitely a gain that you can expect, it's all based on how aggressive the tune is, what other mods are done to the truck and also all the other factors for a dyno. If the dynos were done in the same day in the same conditions, temperature, barometric pressure, etc.

You don't necessarily need to tune them out but you definitely need to tune the vehicle to compensate for additional air flow

If you do not tune the vehicle there is a good chance you will throw a CEL


It's a 3" exhaust system.

Vortec350ss

iTrader: (20)

I love that its all 3". This could be a great performance option for guys with big HP blower builds too.