Any differences between THOR and GEMS cats?

[kooky_guy]

Hi All,

Just a quickie (I hope). I've been offered a pair of cats from a THOR engined 4.0. Will they be the same as mine (GEMS 4.6)?

I thought the THOR vehicles had two lambda sensors per cat, but this only seems to have a single sensor at the front of each cat so I'm hoping they will work (I don't have mine with me to check).

Guy

 

[Druim]

Hi All,

Just a quickie (I hope). I've been offered a pair of cats from a THOR engined 4.0. Will they be the same as mine (GEMS 4.6)?

I thought the THOR vehicles had two lambda sensors per cat, but this only seems to have a single sensor at the front of each cat so I'm hoping they will work (I don't have mine with me to check).

Guy

Changed in 99, so if both are from before or after 99 it should fit. Donno if the sensor are the same though, maybe this link gives a clue.
Exhaust V8 - Island 4x4 - Specialists in Land Rover and Range Rover Parts and accessories for all models. UK and worldwide mail order.

 

[kooky_guy]

Changed in 99, so if both are from before or after 99 it should fit. Donno if the sensor are the same though, maybe this link gives a clue.
Exhaust V8 - Island 4x4 - Specialists in Land Rover and Range Rover Parts and accessories for all models. UK and worldwide mail order.

Well that's the problem. Mine is a GEMS (ie pre '99) and the donor is a THOR (post '99).

I always thought they were different (mainly because of the number of lambda sensors) but these THOR cats only have a single sensor like mine.

 

[MrGorsky]

I thought pre and post cat lambda sensors are only for Japan and NAS cars because of their tighter emissions laws.....

 

[Druim]

Well that's the problem. Mine is a GEMS (ie pre '99) and the donor is a THOR (post '99).

I always thought they were different (mainly because of the number of lambda sensors) but these THOR cats only have a single sensor like mine.

1 sensor only in GB, exhaust will probably fit but you may have to use the old sensors or buy new for Gems as its different ECU's