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Click HERE to Shop BigStuff Gen4 ProXtreme EFI Systems

Get On-Site & Remote Tuning Services from Our Authorized Dealers

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Click HERE to Shop BigStuff Gen4 ProXtreme EFI Systems

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GEN4 PRO XTREME - GEN4 OFU Harness Kit - DAE2
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GEN4 PRO XTREME – GEN4 OFU Harness Kit – DAE2

BigStuff TPM
$379.00
Provides one wiring harness for the Data Acquisition External (DAE) sensors.
GEN4 PRO XTREME - GEN4 OFU Harness Kit - DAE3
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GEN4 PRO XTREME – GEN4 OFU Harness Kit – DAE3

BigStuff TPM
$325.00
Provides one wiring harness for the DAE3 sensors.
GEN4 PRO XTREME - GEN4 OFU Harness Kit - E85
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GEN4 PRO XTREME – GEN4 OFU Harness Kit – E85

BigStuff TPM
$109.00
Provides one wiring harness for wiring in an E85 sensor.
GEN4 PRO XTREME - GEN4 OFU Harness Kit - SR2.3
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GEN4 PRO XTREME – GEN4 OFU Harness Kit – SR2.3

BigStuff TPM
$119.00
Provides one wiring harness for connecting up one driveshaft sensor to the GEN4 ECU.
GEN4 PRO XTREME - GEN4 SFU Harness & H/W Kit - Secondary LSU4.9 WBO2
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GEN4 PRO XTREME – GEN4 SFU Harness & H/W Kit – Secondary LSU4.9 WBO2

BigStuff TPM
$229.00 – $339.00Price range: $229.00 through $339.00
The secondary LSU4.9 wideband oxygen sensor upgrade is recommended to improve the additional AFR data collection and run the ECU in bank-to-bank closed loop AFR control.
GEN4 PRO XTREME - GEN4 SFU Harness & H/W Kit - Touch Screen Dash
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GEN4 PRO XTREME – GEN4 SFU Harness & H/W Kit – Touch Screen Dash

BigStuff TPM
$599.00 – $1,399.00Price range: $599.00 through $1,399.00
For control over your GEN4 ECU when your laptop is not available, we recommend the BigStuff Touch Screen Dash.
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GEN4 PRO XTREME – GEN4 SFU Kit – CAN DAKOTA DIGITAL

BigStuff TPM
$375.00
GEN4 PRO XTREME - GEN4 SFU Kit - CAN ROLL RACE
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GEN4 PRO XTREME – GEN4 SFU Kit – CAN ROLL RACE

BigStuff TPM
$375.00
GEN4 PRO XTREME - GEN4 SFU Kit - Racepak HUD - CAN UDX
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GEN4 PRO XTREME – GEN4 SFU Kit – Racepak HUD – CAN UDX

BigStuff TPM
$375.00
For our racers who are running a Racepak UDX or IQ3 dash and want the Bigstuff3 GEN4 ECU to pass its data out, this is for you.
GEN4 PRO XTREME - GEN4 SFU Kit - Racepak HUD - CAN VNET
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GEN4 PRO XTREME – GEN4 SFU Kit – Racepak HUD – CAN VNET

BigStuff TPM
$375.00
For our racers who are running a Racepak data logger and want the Bigstuff3 GEN4 ECU to pass its data out, this is for you.

Only 2 left in stock

GEN4 PRO XTREME - In-Vehicle Wireless Router Kit
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GEN4 PRO XTREME – In-Vehicle Wireless Router Kit

BigStuff TPM
$159.00
This kit is for a true WiFi connection to you ECU. It includes one mini wireless router, 120v power adapter, cigarette lighter adapter and a battery power supply. On a full charge the battery can last over 8 hours and will let you connect to your ECU without the need for cables anymore!
GEN4 PRO XTREME - MWH & IWH Kit - 4.6/5.4L MOD & EV1
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GEN4 PRO XTREME – MWH & IWH Kit – 4.6/5.4L MOD & EV1

BigStuff TPM
$799.00
GEN4 PRO XTREME - MWH & IWH Kit - 4.6/5.4L MOD & EV1 Fuel Injector Clips
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BigStuff is an American-based company focused on the design, manufacture, and marketing of state-of-the-art electronic engine and powertrain controllers for the performance aftermarket.

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BigStuff TPM
The off-season will be here in no time. Ready to step up your program and WIN in 2026? Give #BigStuffTPM a call and we'll get you set up with the latest in total power management solutions. 💪📸 Peter PisaliNDRC – National Drag Racing Championshipnship winner … See MoreSee Less

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