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For Z06s with the secondary radiator those also help exhaust the air that passes through. That wasn’t designed until after the overheating problems needed a fix though so not their initially designed use.
The two inboard holes went away on 2015+ cars and in their spot some slight tunneling was added to the undertray. Both my '15 z51 and my '15 Z06 don't have them. the one on the passenger side is the inlet to your air filter! That's how the engine breathes in. On cars with horizontal auxiliary coolers, they are how the coolers exhaust air.
Without the aux cooler, the only reasons I think the driver side hole is there for is:
Symmetry
A way for the sound of the horn to escape (it's right above the hole)
Cooling for the headlight heat sink???
I'm fishing now
Last edited by BrunoTheMellow; Mar 9, 2020 at 09:12 PM.
For Z06s with the secondary radiator those also help exhaust the air that passes through. That wasn’t designed until after the overheating problems needed a fix though so not their initially designed use.
thx for the reply. That makes a lot of sense.
Originally Posted by BrunoTheMellow
The two inboard holes went away on 2015+ cars and in their spot some slight tunneling was added to the undertray. Both my '15 z51 and my '15 Z06 don't have them. the one on the passenger side is the inlet to your air filter! That's how the engine breathes in. On cars with horizontal auxiliary coolers, they are how the coolers exhaust air.
Without the aux cooler, the only reasons I think the driver side hole is there for is:
Symmetry
A way for the sound of the horn to escape (it's right above the hole)
Cooling for the headlight heat sink???
I'm fishing now
thx for the reply. I learned something new today.
I did noticed that wide body cars had some kind of tunneling that directed air to the brakes. And I thought about buying that part. But unfortunately it’s not a single piece that gets attached. I would have to replace both front fender liners.
I did noticed that wide body cars had some kind of tunneling that directed air to the brakes. And I thought about buying that part. But unfortunately it’s not a single piece that gets attached. I would have to replace both front fender liners.
fender liners are the same, essentially for what you're asking. Splitter is what matters. To get the splitter undertray you need a stage 2/3 splitter.
That tunneling doesn't do as much for the brakes as the ducting in the front bumper and the extra Z07 package lower control arm brake ducts. (Google that).
Last edited by BrunoTheMellow; Mar 10, 2020 at 07:34 AM.
fender liners are the same, essentially for what you're asking. Splitter is what matters. To get the splitter undertray you need a stage 2/3 splitter.
That tunneling doesn't do as much for the brakes as the ducting in the front bumper and the extra Z07 package lower control arm brake ducts. (Google that).
Unfortunately I can’t. The car has the ACS front splitter. And I’m not sure if I can install the factory undertray at all. If I can, it won’t have a complete seal. Since it’s not the same shape.
Unfortunately I can’t. The car has the ACS front splitter. And I’m not sure if I can install the factory undertray at all. If I can, it won’t have a complete seal. Since it’s not the same shape.
the acs undertray takes over the factory undertray. I wouldn't worry about it! What does it look like underneath your own car?
Oh that's an odd splitter.... I bet the gap is actually to keep the splitter from deforming excessively at high speed due to not having undertray for support.
Can't do much above that style splitter. Won't hurt as is.
Oh that's an odd splitter.... I bet the gap is actually to keep the splitter from deforming excessively at high speed due to not having undertray for support.
Can't do much above that style splitter. Won't hurt as is.
The holes serve two purposes. Vent hot air and allows you to open the drain plug on the Intercooler reservoir on the left side(passenger side). The second reason may just be luck on GM's part.
The holes serve two purposes. Vent hot air and allows you to open the drain plug on the Intercooler reservoir on the left side(passenger side). The second reason may just be luck on GM's part.
Underbody holes/openings...
