Measurable PSI is dependant on several factors including but not limited to; temperature, barometric pressure (including humidity and altitude) and flow characteristic modifications such as a 'cold air intake', exhaust (headers, high flow cat, cat-back exhaust etc), cam (springs, push rods, rockers etc)

Many other manufacturers and retailers will market their pulleys by whatever generic boost level or horsepower gain, but the Pulley Boys prefer to list pulleys by actual size and give sample data where possible that is reported by actual customers. All pulley sizes listed are as measured over the ribs where the belt contacts.

Pulley Boys do not warrantee any claims as to performance of any given pulley including typographical errors or damage caused by over-boost conditions. Care must be taken when knock retard or ping (detonation) occurs.

If you would like to contribute information to this database, please email the pulymkr.

Measurable PSI is dependant on several factors including but not limited to; temperature, barometric pressure (including humidity and altitude) and flow characteristic modifications such as a 'cold air intake', exhaust (headers, high flow cat, cat-back exhaust etc), cam (springs, push rods, rockers etc)

Many other manufacturers and retailers will market their pulleys by whatever generic boost level or horsepower gain, but the Pulley Boys prefer to list pulleys by actual size and give sample data where possible that is reported by actual customers. All pulley sizes listed are as measured over the ribs where the belt contacts.

Pulley Boys do not warrantee any claims as to performance of any given pulley including typographical errors or damage caused by over-boost conditions. Care must be taken when knock retard or ping (detonation) occurs.

If you would like to contribute information to this database, please email info@pulleyboys.com.

Measurable PSI is dependant on several factors including but not limited to; temperature, barometric pressure (including humidity and altitude) and flow characteristic modifications such as a 'cold air intake', exhaust (headers, high flow cat, cat-back exhaust etc), cam (springs, push rods, rockers etc)

Many other manufacturers and retailers will market their pulleys by whatever generic boost level or horsepower gain, but the Pulley Boys prefer to list pulleys by actual size and give sample data where possible that is reported by actual customers. All pulley sizes listed are as measured over the ribs where the belt contacts.

Pulley Boys do not warrantee any claims as to performance of any given pulley including typographical errors or damage caused by over-boost conditions. Care must be taken when knock retard or ping (detonation) occurs.

If you would like to contribute information to this database, please email the pulymkr.

Measurable PSI is dependant on several factors including but not limited to; temperature, barometric pressure (including humidity and altitude) and flow characteristic modifications such as a 'cold air intake', exhaust (headers, high flow cat, cat-back exhaust etc), cam (springs, push rods, rockers etc)

Many other manufacturers and retailers will market their pulleys by whatever generic boost level or horsepower gain, but the Pulley Boys prefer to list pulleys by actual size and give sample data where possible that is reported by actual customers. All pulley sizes listed are as measured over the ribs where the belt contacts.

Pulley Boys do not warrantee any claims as to performance of any given pulley including typographical errors or damage caused by over-boost conditions. Care must be taken when knock retard or ping (detonation) occurs.

If you would like to contribute information to this database, please email the pulymkr.

Measurable PSI is dependant on several factors including but not limited to; temperature, barometric pressure (including humidity and altitude) and flow characteristic modifications such as a 'cold air intake', exhaust (headers, high flow cat, cat-back exhaust etc), cam (springs, push rods, rockers etc)

Many other manufacturers and retailers will market their pulleys by whatever generic boost level or horsepower gain, but the Pulley Boys prefer to list pulleys by actual size and give sample data where possible that is reported by actual customers. All pulley sizes listed are as measured over the ribs where the belt contacts.

Pulley Boys do not warrantee any claims as to performance of any given pulley including typographical errors or damage caused by over-boost conditions. Care must be taken when knock retard or ping (detonation) occurs.

If you would like to contribute information to this database, please email the pulymkr.

Measurable PSI is dependant on several factors including but not limited to; temperature, barometric pressure (including humidity and altitude) and flow characteristic modifications such as a 'cold air intake', exhaust (headers, high flow cat, cat-back exhaust etc), cam (springs, push rods, rockers etc)

Many other manufacturers and retailers will market their pulleys by whatever generic boost level or horsepower gain, but the Pulley Boys prefer to list pulleys by actual size and give sample data where possible that is reported by actual customers. All pulley sizes listed are as measured over the ribs where the belt contacts.

Pulley Boys do not warrantee any claims as to performance of any given pulley including typographical errors or damage caused by over-boost conditions. Care must be taken when knock retard or ping (detonation) occurs.

If you would like to contribute information to this database, please email the pulymkr.

Measurable PSI is dependant on several factors including but not limited to; temperature, barometric pressure (including humidity and altitude) and flow characteristic modifications such as a 'cold air intake', exhaust (headers, high flow cat, cat-back exhaust etc), cam (springs, push rods, rockers etc)

Many other manufacturers and retailers will market their pulleys by whatever generic boost level or horsepower gain, but the Pulley Boys prefer to list pulleys by actual size and give sample data where possible that is reported by actual customers. All pulley sizes listed are as measured over the ribs where the belt contacts.

Pulley Boys do not warrantee any claims as to performance of any given pulley including typographical errors or damage caused by over-boost conditions. Care must be taken when knock retard or ping (detonation) occurs.

If you would like to contribute information to this database, please email the pulymkr.

Measurable PSI is dependant on several factors including but not limited to; temperature, barometric pressure (including humidity and altitude) and flow characteristic modifications such as a 'cold air intake', exhaust (headers, high flow cat, cat-back exhaust etc), cam (springs, push rods, rockers etc)

Many other manufacturers and retailers will market their pulleys by whatever generic boost level or horsepower gain, but the Pulley Boys prefer to list pulleys by actual size and give sample data where possible that is reported by actual customers. All pulley sizes listed are as measured over the ribs where the belt contacts.

Pulley Boys do not warrantee any claims as to performance of any given pulley including typographical errors or damage caused by over-boost conditions. Care must be taken when knock retard or ping (detonation) occurs.

If you would like to contribute information to this database, please email the pulymkr.                           SKU1211

Measurable PSI is dependant on several factors including but not limited to; temperature, barometric pressure (including humidity and altitude) and flow characteristic modifications such as a 'cold air intake', exhaust (headers, high flow cat, cat-back exhaust etc), cam (springs, push rods, rockers etc)

Many other manufacturers and retailers will market their pulleys by whatever generic boost level or horsepower gain, but the Pulley Boys prefer to list pulleys by actual size and give sample data where possible that is reported by actual customers. All pulley sizes listed are as measured over the ribs where the belt contacts.

Pulley Boys do not warrantee any claims as to performance of any given pulley including typographical errors or damage caused by over-boost conditions. Care must be taken when knock retard or ping (detonation) occurs.

If you would like to contribute information to this database, please email the pulymkr.

Measurable PSI is dependant on several factors including but not limited to; temperature, barometric pressure (including humidity and altitude) and flow characteristic modifications such as a 'cold air intake', exhaust (headers, high flow cat, cat-back exhaust etc), cam (springs, push rods, rockers etc)

Many other manufacturers and retailers will market their pulleys by whatever generic boost level or horsepower gain, but the Pulley Boys prefer to list pulleys by actual size and give sample data where possible that is reported by actual customers. All pulley sizes listed are as measured over the ribs where the belt contacts.

Pulley Boys do not warrantee any claims as to performance of any given pulley including typographical errors or damage caused by over-boost conditions. Care must be taken when knock retard or ping (detonation) occurs.

If you would like to contribute information to this database, please email the pulymkr.

Measurable PSI is dependant on several factors including but not limited to; temperature, barometric pressure (including humidity and altitude) and flow characteristic modifications such as a 'cold air intake', exhaust (headers, high flow cat, cat-back exhaust etc), cam (springs, push rods, rockers etc)

Many other manufacturers and retailers will market their pulleys by whatever generic boost level or horsepower gain, but the Pulley Boys prefer to list pulleys by actual size and give sample data where possible that is reported by actual customers. All pulley sizes listed are as measured over the ribs where the belt contacts.

Pulley Boys do not warrantee any claims as to performance of any given pulley including typographical errors or damage caused by over-boost conditions. Care must be taken when knock retard or ping (detonation) occurs.

If you would like to contribute information to this database, please email the pulymkr. SKU64

Measurable PSI is dependant on several factors including but not limited to; temperature, barometric pressure (including humidity and altitude) and flow characteristic modifications such as a 'cold air intake', exhaust (headers, high flow cat, cat-back exhaust etc), cam (springs, push rods, rockers etc)

Many other manufacturers and retailers will market their pulleys by whatever generic boost level or horsepower gain, but the Pulley Boys prefer to list pulleys by actual size and give sample data where possible that is reported by actual customers. All pulley sizes listed are as measured over the ribs where the belt contacts.

Pulley Boys do not warrantee any claims as to performance of any given pulley including typographical errors or damage caused by over-boost conditions. Care must be taken when knock retard or ping (detonation) occurs.

If you would like to contribute information to this database, please email the pulymkr. SKU641