Butler Performance Inc. » BOP

• Now Featuring needle roller thrust bearing for cam end play control
• NEW wider belt and gears for higher HP capacity Improved Idler system
• Dry system allows easy access and inspection
• Cam timing externally adjustable to +/- 10 degrees
• Absorbs/Reduces harmonics to valve train
• Improves valve spring and seat life significantly
• Synchronous belt more accurate than conventional timing chains
• Less reciprocating mass
• Low friction, Kevlar reinforced belt
• Requires less power to drive
• No block modifications required
• High quality coatings and stainless fasteners
• Retains stock harmonic balancer location
• Easy cam removal without removing front plate
• Eliminates messy timing chain cover removal
• Tall deck version does not use an idler
• Includes oil pan modification kit.
• Drive accessories behind the Balancer

• Now Featuring needle roller thrust bearing for cam end play control
• NEW wider belt and gears for higher HP capacity Improved Idler system
• Dry system allows easy access and inspection
• Cam timing externally adjustable to +/- 10 degrees
• Absorbs/Reduces harmonics to valve train
• Improves valve spring and seat life significantly
• Synchronous belt more accurate than conventional timing chains
• Less reciprocating mass
• Low friction, Kevlar reinforced belt
• Requires less power to drive
• No block modifications required
• High quality coatings and stainless fasteners
• Retains stock harmonic balancer location
• Easy cam removal without removing front plate
• Eliminates messy timing chain cover removal
• Tall deck version does not use an idler
• Includes oil pan modification kit.
• Drive accessories behind the Balancer

• Now Featuring needle roller thrust bearing for cam end play control
• NEW wider belt and gears for higher HP capacity Improved Idler system
• Dry system allows easy access and inspection
• Cam timing externally adjustable to +/- 10 degrees
• Absorbs/Reduces harmonics to valve train
• Improves valve spring and seat life significantly
• Synchronous belt more accurate than conventional timing chains
• Less reciprocating mass
• Low friction, Kevlar reinforced belt
• Requires less power to drive
• No block modifications required
• High quality coatings and stainless fasteners
• Retains stock harmonic balancer location
• Easy cam removal without removing front plate
• Eliminates messy timing chain cover removal
• Tall deck version does not use an idler
• Includes oil pan modification kit.
• Drive accessories behind the Balancer

• Now Featuring needle roller thrust bearing for cam end play control
• NEW wider belt and gears for higher HP capacity Improved Idler system
• Dry system allows easy access and inspection
• Cam timing externally adjustable to +/- 10 degrees
• Absorbs/Reduces harmonics to valve train
• Improves valve spring and seat life significantly
• Synchronous belt more accurate than conventional timing chains
• Less reciprocating mass
• Low friction, Kevlar reinforced belt
• Requires less power to drive
• No block modifications required
• High quality coatings and stainless fasteners
• Retains stock harmonic balancer location
• Easy cam removal without removing front plate
• Eliminates messy timing chain cover removal
• Tall deck version does not use an idler
• Includes oil pan modification kit.
• Drive accessories behind the Balancer

The new BOP Engineering One-piece rear mail seal is the most advanced rear main seal on the market for the traditional Pontiac V-8. This revolutionary design features a number of state of the art innovations including relocation of the parting line which greatly reducing the risk of leaking, a more pliable construction that will work more effectively in engines with seal groove geometry issues, and double lip design to provide twice the protection against leakage as well as supporting outstanding vacuum numbers.

See Part # RMS-01 for the traditional style 2pc single lip rear main seal

The new BOP Engineering One-piece rear mail seal is the most advanced rear main seal on the market for the traditional Pontiac V-8. This revolutionary design features a number of state of the art innovations including relocation of the parting line which greatly reducing the risk of leaking, a more pliable construction that will work more effectively in engines with seal groove geometry issues, and double lip design to provide twice the protection against leakage as well as supporting outstanding vacuum numbers.

See Part # RMS-02 for the traditional style 2pc single lip rear main seal

The BOP intake is a single 4 barrel cast aluminum manifold designed from the ground up to outflow all other 4 barrel intakes available for the traditional Pontiac V-8. The casting fits most Pontiac cylinder heads including factory heads, Edelbrock heads (including wide ports), all Wenzler heads including the Super Chief (with or without the Super Chief's cast in spacer), and the new All Pontiac/DCI Tiger head (without the need for a head to intake spacer). The large port head intakes are is CNC port matched to each head type. All intakes will need some minor port matching/blending for optimum performance. The intake has a dominator pattern with a 1" spacer cast in The factory machined height is about equal to a Victor with a 1 5/8 " spacer. Bosses for EFI and/or Nitrous applications are also cast into runners. Testing has shown the BOP intake worth an average of 35 hp, 20 lb-ft of torque, and a cleaner fuel curve across the rpm band. These results were attained in a back to back testing on a 515 inch Pontiac engine comparing a fully ported Edelbrock Victor with 1" spacer to a BOP manifold with just a port match and no plenum work.

The BOP intake is a single 4 barrel cast aluminum manifold designed from the ground up to outflow all other 4 barrel intakes available for the traditional Pontiac V-8. The casting fits most Pontiac cylinder heads including factory heads, Edelbrock heads (including wide ports), all Wenzler heads including the Super Chief (with or without the Super Chief's cast in spacer), and the new All Pontiac/DCI Tiger head (without the need for a head to intake spacer). The large port head intakes are is CNC port matched to each head type. All intakes will need some minor port matching/blending for optimum performance. The intake has a dominator pattern with a 1" spacer cast in The factory machined height is about equal to a Victor with a 1 5/8 " spacer. Bosses for EFI and/or Nitrous applications are also cast into runners. Testing has shown the BOP intake worth an average of 35 hp, 20 lb-ft of torque, and a cleaner fuel curve across the rpm band. These results were attained in a back to back testing on a 515 inch Pontiac engine comparing a fully ported Edelbrock Victor with 1" spacer to a BOP manifold with just a port match and no plenum work.

The BOP intake is a single 4 barrel cast aluminum manifold designed from the ground up to outflow all other 4 barrel intakes available for the traditional Pontiac V-8. The casting fits most Pontiac cylinder heads including factory heads, Edelbrock heads (including wide ports), all Wenzler heads including the Super Chief (with or without the Super Chief's cast in spacer), and the new All Pontiac/DCI Tiger head (without the need for a head to intake spacer). The large port head intakes are is CNC port matched to each head type. All intakes will need some minor port matching/blending for optimum performance. The intake has a dominator pattern with a 1" spacer cast in The factory machined height is about equal to a Victor with a 1 5/8 " spacer. Bosses for EFI and/or Nitrous applications are also cast into runners. Testing has shown the BOP intake worth an average of 35 hp, 20 lb-ft of torque, and a cleaner fuel curve across the rpm band. These results were attained in a back to back testing on a 515 inch Pontiac engine comparing a fully ported Edelbrock Victor with 1" spacer to a BOP manifold with just a port match and no plenum work.