Wideband O2 Controller Comparison

Product	Price	Display	Connectivity	Key Features
SLC Free 2	$45 w/o sensor, $95 w/ LSU 4.9	Yes	Linear, Narrowband	Lowest cost wideband, easy to build DIY kit.
Spartan 2	$75 w/o sensor, $125 w/ LSU 4.9	None	Linear, Narrowband	Lowest cost plug and play Wideband, 2 yr warranty, easy installation.
Spartan 3 Lite	$109 w/o sensor, $159 w/ LSU 4.9, $209 w/ LSU ADV	None	2x Linear, CAN, Serial	Best wideband controller on the market without CAN Bus. 2 yr warranty
Spartan 3	$139 w/o sensor, $189 w/ LSU 4.9, $239 w/ LSU ADV	Torque Pro for Android	2x Linear, CAN, USB	Best wideband controller on the market with CAN Bus. 2 yr warranty

SLC Free 2 and Spartan 2 are cheap and reliable, they are part of our 2nd generation of wideband controllers first released in 2009.

If you can solder and construct your own cables then SLC Free 2 is an unbeatable value at $45 and it includes a display.

Spartan 2 is a fully assembled product and is the next best value.

Spartan 3 and Spartan 3 Lite is our 3rd generation wideband controller first released in 2019.

In terms of accuracy, response time, and resolution, Spartan 3/Lite is roughly 10x better in all 3 aspects compared to our 2nd generation wideband controllers.

Spartan 3 offers CAN Bus, Spartan 3 Lite does not. Spartan 3/Lite is compatible with both the Bosch LSU 4.9 and the Bosch LSU ADV.

Spartan 3/lite with the ADV sensor offers a 15% increase in accuracy and a 20x increase in resolution versus Spartan 3/lite with a LSU 4.9 sensor. The 20x increase in resolution is unique to Spartan 3/lite, all other wideband controllers that use the ADV sensor offer no resolution advantage over the LSU 4.9.