Welcome!
The Gen 4 hood vent screens/grilles are not required. They serve no functional purpose other than to keep larger debris (e.g. leaves) out of the engine bay.
For racing applications, most prefer to run
without the screens. If I recall correctly, the SRT engineers stated that it helped a bit with cooling (allows the hot air from the radiator fan to escape more quickly due to decreased flow restriction) and also reduced front end lift to some extent (same reason). I've run my car with and without the screens installed - you won't notice any of the previously mentioned benefits for street driven applications.
Appearance is personal preference - I prefer the looks of the Gen 4 hood
with the screens installed. To me, the car looks a bit unrefined/unfinished with them removed. Some would argue that it looks more like a race car with them removed, which fits the Viper's character better. There is no wrong choice. If you can source the screens, they can be installed just as easily as they can be removed.
The hard part will be sourcing them as they are discontinued (like many other Viper parts)...I'm sure there are some out there, but you may have to do some digging. Starting with a Viper parts salvage yard (e.g. X2 Builders) would probably be a good idea - scouring Ebay on a regular basis can also pay off. Expect to pay a pretty penny regardless of where you source them.
There are six unique part numbers for each screen as they are all slightly different shapes front-to-back and mirror images side-to-side. The part numbers are shown here:
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If something ever happens to this picture, here is a list of the part numbers:
Right (passenger) side screens:
- Front: 5030954AA
- Middle: 5030956AA
- Back: 5030958AA
Left (driver) side screens:
- Front: 5030955AA
- Middle: 5030957AA
- Back: 5030959AA
The screens are held in place with a bunch of Christmas tree push pins - 7 per screen (42 total). Don't pay Chrysler/Mopar prices - the correct push pins (weather strip retainers for a Neon and likely many other Chrysler/Dodge products) can be sourced here:
Weatherstrip Retainers Chrysler Neon
www.clipsandfasteners.com
$5.99 for a pack of 50 is much more palatable than what a dealership parts department would charge (likely a couple bucks per push pin).
If you ever do remove the screens,
do not reuse the push pins. Some folks have had their screens fly out while going down the road as a result of this mistake.
Here are a couple of pointers when/if removing them:
- Drive the car until the engine is nice and warmed up - this will soften the plastic a little, and make everything much easier to remove
- A plastic trim removal pry tool comes in very handy - this will keep you from damaging the paint
- Put a couple of large towels down that cover the engine bay - this will help catch any push pins that decide to go flying (and they will)
- Gently push down from the top while you pry from the bottom to remove the push pins - once the first push pin comes out, the rest will come out a bit more easily
That should about cover everything you need to know about those screens. I'm sure others will chime in if I've missed anything.
-Steve