Table:
text: Cox model engine
Cylinders
Cylinders
Engine Exhaust_Ports Bypass_Ports Bypass_Boosters SPI Tapered_Grind Number_on_cyl_
Black Widow post 96 Slit 2 1 No No None
Texaco Slit 2 1 No No None
QRC pre 96 Open 2 0 No No 6
QRC post 96 Slit 2 0 No No None
Killer Bee ‘96 Slit 2 1 Yes Yes 1 None
Killer Bee ‘02 Slit 2 1 No No None
Venom Open 2 1 Yes Yes 1 None
Medallion pre 96 Open 2 0 Yes No 1
Medallion post 96 Slit 2 0 No No None
Medallion 051 Slit 2 1 No No 7
Tee Dee 049 Open 2 2 Yes Yes 2 4

text: Cox model engine
Cylinders
Cylinders
Engine Exhaust_Ports Bypass_Ports Bypass_Boosters SPI Tapered_Grind Number_on_cyl_
Space Bug Open 2 0 Yes Yes None
Thermal Hopper Open 2 0 Yes Yes None
Space Bug Jnr Open 1 0 Yes Yes None
Space Hopper Open 2 0, 2 side flutes in 1961 Yes Yes None, #4 on 1961 models
Strato Bug Open 2 0 Yes Yes None
Product Engine Open 1 0 Yes Yes, No after Leisure 2
SureStart Slit 2 1 No No None
Babe Bee Open 1 0 Yes Yes, No after Leisure 2
Golden Bee Open 1 0 Yes Yes, No after Leisure 2
Black Widow pre 96 Open 2 0 Yes No 1

Question: How many bypass boosters are there on the engine with slotted exhaust ports and SPI is one of the Cox model engines?