No ..you read correctly ..I just wrote wrongly
I had a PT up on the lift at my buddy's shop and it had 2.4 NA ..I did fit a FL1A up to it ..very little room in terms of diameter ...loads of it in length.
by the Wix site ..it does appear to bridge the difference between PH16 and PH8A (PH43)
PH43
Part Number: 51068
UPC Number: 765809510685
Principal Application: Chrysler (70-91), Ford/Mercury (83-97), Land Rover (95-04), Toyota (68-90)
All Applications
Style: Spin-On Lube Filter
Service: Lube
Type: Full Flow
Media: Paper
Height: 4.338
Outer Diameter Top: 3.660
Outer Diameter Bottom: Closed
Thread Size: 3/4-16
By-Pass Valve Setting-PSI: 8-11
Anti-Drain Back Valve: Yes
Beta Ratio: 2/20=10/26
Burst Pressure-PSI: 275
Max Flow Rate: 7-9 GPM
Nominal Micro Rating: 19
PH8A
Part Number: 51515
UPC Number: 765809515154
Principal Application: Chrysler Family of Cars/Trucks (57-70), Ford Family of Cars/Trucks (57-00), Mazda Trucks (94-00), Toyota Landcruiser (71-96) - (Two Quart version is 51773)
All Applications
Style: Spin-On Lube Filter
Service: Lube
Type: Full Flow
Media: Paper
Height: 5.178
Outer Diameter: 3.660
Thread Size: 3/4-16
By-Pass Valve Setting-PSI: 8-11
Anti-Drain Back Valve: Yes
Beta Ratio: 2/20=19/41
Burst Pressure-PSI: 270
Max Flow Rate: 7-9 GPM
Nominal Micro Rating: 19
PH16
Part Number: 51085
UPC Number: 765809510852
Principal Application: Chrysler/Dodge/Jeep Vehicles (91-06), Mitsubishi Eclipse (95-99); Caterpillar 3 Series Excavators, 9 Series Loaders
All Applications
Style: Spin-On Lube Filter
Service: Lube
Type: Full Flow
Media: Paper
Height: 3.790
Outer Diameter Top: 3.660
Outer Diameter Bottom: Closed
Thread Size: 3/4-16
By-Pass Valve Setting-PSI: 8-11
Anti-Drain Back Valve: Yes
Beta Ratio: 2/20=15/28
Burst Pressure-PSI: 365
Max Flow Rate: 7-9 GPM
Nominal Micro Rating: 20