High Flow ZL1 Heat Extraction Hood Bracket
The 6th Generation Camaro ZL1's hood is clearly a work of art, and admired by many. Not just for its beautiful lines, and converging materials but most all, because it is functional. Unfortunately, GM was required to balance extracting as much heat as possible while minimizing the intrusion of water into the engine bay. The GM solution was a large and unfortunatly restrictive water guard. While this design serves its purpose in heavy rain, it inevitably constrained the hood's cooling capacity, and worst of all, this limitation has gone largely unaddressed by the aftermarket… until now!
Inspired by the formidable GT4.R race car, we set out to create a sleek, cost-effective solution that delivers quantifiable performance benefits, with a minimalist form factor. We achieved this by replacing the restrictive factory rain guard with our precision-engineered, 3/16” thick all-aluminum GMS High Flow Hood Insert Bracket. Installing is quick, and will help ZL1 owners unlock a 70% + increase in airflow area allowing for better heat extraction and cooling potential, while maintaining the current carbon insert location and angle. For those weight reduction nerds, this upgrade also sheds around 2 pounds over the OEM rain guard.
Although the engine bay is designed to handle water contact, we recommend this modification for fair weather driving only. Installation is a breeze, and includes upgraded stainless steel hardware, or you can utilizing all existing factory hardware. The GMS High Flow Hood Insert Bracket is meticulously crafted from thick .125” aluminum, following the natural lines of the hood, and finished with a matte black powder coat finish to maintain a clean, OEM aesthetic.
Below are the results of our first street driving test. More high speed and track results to follow.
Underhood Ambient Temperatures measured after a (45 min street / freeway drive with our 900hp ZL1) and a 3 min. idle with hood closed on a 72F day. This was a light drive with moderate acceleration intended to mimic normal driving. Average oil temps were 185F during the test as evidence.
Near Radiator Support (balanced both sides) = 27F Temp Reduction
Near Last Coil Pack (balanced both sides) = 15F Temp Reduction
Surface Temperatures measured once the hood was opened.
Katech 103mm TB = 11F Temp Reduction
DMS Supercharger Lid = 13F Temp Reduction
Katech Cast Valve Covers = 19F Temp Reduction
Coated American Racing Headers = 28F Temp Reduction
Because this test was conducted with light driving only, higher temp reductions can be expected during hotter days and more extreme driving. Stay tuned for independent track testing results…
The GMS High Flow Hood Bracket is a must have for those who race or drive in warm / hot climates, considering how much heat is produced by the supercharged LT4 engine modified or not. Just another way Griffin Motorsports is working hard to help you keep your ZL1 cool!
This inexpensive upgrade benefits all driving situations, not just on the race track. We have tested this on our 900hp car for over 3,000 miles, speeds up-to 150mph+, and several car washes with no issues. Installs in 15 minutes and can easily be reverted back to OEM for harsh weather seasonal driving.
Matching Brake Reservoir; By popular demand we now offer a bundle discount if you want to add this beautiful billet aluminum brake reservoir cap that is powder coated to match our hood bracket in satin wrinkle finish. For those who like to coordinate, it is a great addition. Simply transfer the rubber seal from the old lid, and screw on.
Hardware Options; As you can see from the photos, and by popular request, we now offer (3) levels of hardware.
Option.1 - $0 Extra, simply reuse your OEM bolts.
Option.2 - $10 Extra, includes (11) 316 SS Flange head bolts.
Option.3 - $15 Extra, includes (11) two piece flat head decorative bolts with a gloss black tapered washer base for that upgraded look. This is what I run on my car. Looks super sharp and defiantly worth the few extra buck in my opinion!
What’s in the box;
(1) High Flow Hood Insert Bracket (Satin Wrinkle Black Powder Coat)
(8) Black Plastic Push Rivets to cover old holes (note; the insertable barb needs to be trimmed to fit inside the hood’s threaded hole)
(1) M6 Jack Nut + (1) Rivet Nut (suggested to install / see instructions below)
What YOU will need to provide:
Simple hand tools (Putty Knife + 10mm Socket + H14 Allen Wrench + 1/2” stubby step drill bit for jack not install or a rivet nut installation tool)
Fitment: 2017-2024 Camaro ZL1 only. Note; we have been told this item is a must for ZL1’s with a 2650 supercharger and port plates as those applications end up needing to drop the engine cradle to fit.
Install Guide can be downloaded by clicking THIS link.
The 6th Generation Camaro ZL1's hood is clearly a work of art, and admired by many. Not just for its beautiful lines, and converging materials but most all, because it is functional. Unfortunately, GM was required to balance extracting as much heat as possible while minimizing the intrusion of water into the engine bay. The GM solution was a large and unfortunatly restrictive water guard. While this design serves its purpose in heavy rain, it inevitably constrained the hood's cooling capacity, and worst of all, this limitation has gone largely unaddressed by the aftermarket… until now!
Inspired by the formidable GT4.R race car, we set out to create a sleek, cost-effective solution that delivers quantifiable performance benefits, with a minimalist form factor. We achieved this by replacing the restrictive factory rain guard with our precision-engineered, 3/16” thick all-aluminum GMS High Flow Hood Insert Bracket. Installing is quick, and will help ZL1 owners unlock a 70% + increase in airflow area allowing for better heat extraction and cooling potential, while maintaining the current carbon insert location and angle. For those weight reduction nerds, this upgrade also sheds around 2 pounds over the OEM rain guard.
Although the engine bay is designed to handle water contact, we recommend this modification for fair weather driving only. Installation is a breeze, and includes upgraded stainless steel hardware, or you can utilizing all existing factory hardware. The GMS High Flow Hood Insert Bracket is meticulously crafted from thick .125” aluminum, following the natural lines of the hood, and finished with a matte black powder coat finish to maintain a clean, OEM aesthetic.
Below are the results of our first street driving test. More high speed and track results to follow.
Underhood Ambient Temperatures measured after a (45 min street / freeway drive with our 900hp ZL1) and a 3 min. idle with hood closed on a 72F day. This was a light drive with moderate acceleration intended to mimic normal driving. Average oil temps were 185F during the test as evidence.
Near Radiator Support (balanced both sides) = 27F Temp Reduction
Near Last Coil Pack (balanced both sides) = 15F Temp Reduction
Surface Temperatures measured once the hood was opened.
Katech 103mm TB = 11F Temp Reduction
DMS Supercharger Lid = 13F Temp Reduction
Katech Cast Valve Covers = 19F Temp Reduction
Coated American Racing Headers = 28F Temp Reduction
Because this test was conducted with light driving only, higher temp reductions can be expected during hotter days and more extreme driving. Stay tuned for independent track testing results…
The GMS High Flow Hood Bracket is a must have for those who race or drive in warm / hot climates, considering how much heat is produced by the supercharged LT4 engine modified or not. Just another way Griffin Motorsports is working hard to help you keep your ZL1 cool!
This inexpensive upgrade benefits all driving situations, not just on the race track. We have tested this on our 900hp car for over 3,000 miles, speeds up-to 150mph+, and several car washes with no issues. Installs in 15 minutes and can easily be reverted back to OEM for harsh weather seasonal driving.
Matching Brake Reservoir; By popular demand we now offer a bundle discount if you want to add this beautiful billet aluminum brake reservoir cap that is powder coated to match our hood bracket in satin wrinkle finish. For those who like to coordinate, it is a great addition. Simply transfer the rubber seal from the old lid, and screw on.
Hardware Options; As you can see from the photos, and by popular request, we now offer (3) levels of hardware.
Option.1 - $0 Extra, simply reuse your OEM bolts.
Option.2 - $10 Extra, includes (11) 316 SS Flange head bolts.
Option.3 - $15 Extra, includes (11) two piece flat head decorative bolts with a gloss black tapered washer base for that upgraded look. This is what I run on my car. Looks super sharp and defiantly worth the few extra buck in my opinion!
What’s in the box;
(1) High Flow Hood Insert Bracket (Satin Wrinkle Black Powder Coat)
(8) Black Plastic Push Rivets to cover old holes (note; the insertable barb needs to be trimmed to fit inside the hood’s threaded hole)
(1) M6 Jack Nut + (1) Rivet Nut (suggested to install / see instructions below)
What YOU will need to provide:
Simple hand tools (Putty Knife + 10mm Socket + H14 Allen Wrench + 1/2” stubby step drill bit for jack not install or a rivet nut installation tool)
Fitment: 2017-2024 Camaro ZL1 only. Note; we have been told this item is a must for ZL1’s with a 2650 supercharger and port plates as those applications end up needing to drop the engine cradle to fit.
Install Guide can be downloaded by clicking THIS link.
The 6th Generation Camaro ZL1's hood is clearly a work of art, and admired by many. Not just for its beautiful lines, and converging materials but most all, because it is functional. Unfortunately, GM was required to balance extracting as much heat as possible while minimizing the intrusion of water into the engine bay. The GM solution was a large and unfortunatly restrictive water guard. While this design serves its purpose in heavy rain, it inevitably constrained the hood's cooling capacity, and worst of all, this limitation has gone largely unaddressed by the aftermarket… until now!
Inspired by the formidable GT4.R race car, we set out to create a sleek, cost-effective solution that delivers quantifiable performance benefits, with a minimalist form factor. We achieved this by replacing the restrictive factory rain guard with our precision-engineered, 3/16” thick all-aluminum GMS High Flow Hood Insert Bracket. Installing is quick, and will help ZL1 owners unlock a 70% + increase in airflow area allowing for better heat extraction and cooling potential, while maintaining the current carbon insert location and angle. For those weight reduction nerds, this upgrade also sheds around 2 pounds over the OEM rain guard.
Although the engine bay is designed to handle water contact, we recommend this modification for fair weather driving only. Installation is a breeze, and includes upgraded stainless steel hardware, or you can utilizing all existing factory hardware. The GMS High Flow Hood Insert Bracket is meticulously crafted from thick .125” aluminum, following the natural lines of the hood, and finished with a matte black powder coat finish to maintain a clean, OEM aesthetic.
Below are the results of our first street driving test. More high speed and track results to follow.
Underhood Ambient Temperatures measured after a (45 min street / freeway drive with our 900hp ZL1) and a 3 min. idle with hood closed on a 72F day. This was a light drive with moderate acceleration intended to mimic normal driving. Average oil temps were 185F during the test as evidence.
Near Radiator Support (balanced both sides) = 27F Temp Reduction
Near Last Coil Pack (balanced both sides) = 15F Temp Reduction
Surface Temperatures measured once the hood was opened.
Katech 103mm TB = 11F Temp Reduction
DMS Supercharger Lid = 13F Temp Reduction
Katech Cast Valve Covers = 19F Temp Reduction
Coated American Racing Headers = 28F Temp Reduction
Because this test was conducted with light driving only, higher temp reductions can be expected during hotter days and more extreme driving. Stay tuned for independent track testing results…
The GMS High Flow Hood Bracket is a must have for those who race or drive in warm / hot climates, considering how much heat is produced by the supercharged LT4 engine modified or not. Just another way Griffin Motorsports is working hard to help you keep your ZL1 cool!
This inexpensive upgrade benefits all driving situations, not just on the race track. We have tested this on our 900hp car for over 3,000 miles, speeds up-to 150mph+, and several car washes with no issues. Installs in 15 minutes and can easily be reverted back to OEM for harsh weather seasonal driving.
Matching Brake Reservoir; By popular demand we now offer a bundle discount if you want to add this beautiful billet aluminum brake reservoir cap that is powder coated to match our hood bracket in satin wrinkle finish. For those who like to coordinate, it is a great addition. Simply transfer the rubber seal from the old lid, and screw on.
Hardware Options; As you can see from the photos, and by popular request, we now offer (3) levels of hardware.
Option.1 - $0 Extra, simply reuse your OEM bolts.
Option.2 - $10 Extra, includes (11) 316 SS Flange head bolts.
Option.3 - $15 Extra, includes (11) two piece flat head decorative bolts with a gloss black tapered washer base for that upgraded look. This is what I run on my car. Looks super sharp and defiantly worth the few extra buck in my opinion!
What’s in the box;
(1) High Flow Hood Insert Bracket (Satin Wrinkle Black Powder Coat)
(8) Black Plastic Push Rivets to cover old holes (note; the insertable barb needs to be trimmed to fit inside the hood’s threaded hole)
(1) M6 Jack Nut + (1) Rivet Nut (suggested to install / see instructions below)
What YOU will need to provide:
Simple hand tools (Putty Knife + 10mm Socket + H14 Allen Wrench + 1/2” stubby step drill bit for jack not install or a rivet nut installation tool)
Fitment: 2017-2024 Camaro ZL1 only. Note; we have been told this item is a must for ZL1’s with a 2650 supercharger and port plates as those applications end up needing to drop the engine cradle to fit.
Install Guide can be downloaded by clicking THIS link.