diff --git a/board/boards/cuatro.h b/board/boards/cuatro.h
index 90d0627517..ea463c3b24 100644
--- a/board/boards/cuatro.h
+++ b/board/boards/cuatro.h
@@ -80,7 +80,32 @@ static void cuatro_set_amp_enabled(bool enabled){
 }
 
 static void cuatro_init(void) {
-  red_chiplet_init();
+  common_init_gpio();
+
+  // A8, A3: OBD_SBU1_RELAY, OBD_SBU2_RELAY
+  set_gpio_output_type(GPIOA, 8, OUTPUT_TYPE_OPEN_DRAIN);
+  set_gpio_pullup(GPIOA, 8, PULL_NONE);
+  set_gpio_output(GPIOA, 8, 1);
+  set_gpio_mode(GPIOA, 8, MODE_OUTPUT);
+
+  set_gpio_output_type(GPIOA, 3, OUTPUT_TYPE_OPEN_DRAIN);
+  set_gpio_pullup(GPIOA, 3, PULL_NONE);
+  set_gpio_output(GPIOA, 3, 1);
+  set_gpio_mode(GPIOA, 3, MODE_OUTPUT);
+
+  // Initialize harness
+  harness_init();
+
+  // Enable CAN transceivers
+  cuatro_enable_can_transceivers(true);
+
+  // Disable LEDs
+  red_set_led(LED_RED, false);
+  red_set_led(LED_GREEN, false);
+  red_set_led(LED_BLUE, false);
+
+  // Set normal CAN mode
+  tres_set_can_mode(CAN_MODE_NORMAL);
 
   // init LEDs as open drain
   set_gpio_output_type(GPIOE, 2, OUTPUT_TYPE_OPEN_DRAIN);
@@ -150,7 +175,7 @@ static void cuatro_init(void) {
 }
 
 board board_cuatro = {
-  .harness_config = &red_chiplet_harness_config,
+  .harness_config = &tres_harness_config,
   .has_obd = true,
   .has_spi = true,
   .has_canfd = true,
@@ -164,7 +189,7 @@ board board_cuatro = {
   .enable_can_transceiver = cuatro_enable_can_transceiver,
   .enable_can_transceivers = cuatro_enable_can_transceivers,
   .set_led = cuatro_set_led,
-  .set_can_mode = red_chiplet_set_can_mode,
+  .set_can_mode = tres_set_can_mode,
   .check_ignition = red_check_ignition,
   .read_voltage_mV = cuatro_read_voltage_mV,
   .read_current_mA = cuatro_read_current_mA,
diff --git a/board/boards/red_chiplet.h b/board/boards/red_chiplet.h
deleted file mode 100644
index e5d1aa097f..0000000000
--- a/board/boards/red_chiplet.h
+++ /dev/null
@@ -1,151 +0,0 @@
-#pragma once
-
-#include "board_declarations.h"
-
-// ///////////////////////////////////// //
-// Red Panda chiplet (STM32H7) + Harness //
-// ///////////////////////////////////// //
-
-// Most hardware functionality is similar to red panda
-
-static void red_chiplet_enable_can_transceiver(uint8_t transceiver, bool enabled) {
-  switch (transceiver) {
-    case 1U:
-      set_gpio_output(GPIOG, 11, !enabled);
-      break;
-    case 2U:
-      set_gpio_output(GPIOB, 10, !enabled);
-      break;
-    case 3U:
-      set_gpio_output(GPIOD, 7, !enabled);
-      break;
-    case 4U:
-      set_gpio_output(GPIOB, 11, !enabled);
-      break;
-    default:
-      break;
-  }
-}
-
-static void red_chiplet_enable_can_transceivers(bool enabled) {
-  uint8_t main_bus = (harness.status == HARNESS_STATUS_FLIPPED) ? 3U : 1U;
-  for (uint8_t i=1U; i<=4U; i++) {
-    // Leave main CAN always on for CAN-based ignition detection
-    if (i == main_bus) {
-      red_chiplet_enable_can_transceiver(i, true);
-    } else {
-      red_chiplet_enable_can_transceiver(i, enabled);
-    }
-  }
-}
-
-static void red_chiplet_set_can_mode(uint8_t mode) {
-  red_chiplet_enable_can_transceiver(2U, false);
-  red_chiplet_enable_can_transceiver(4U, false);
-  switch (mode) {
-    case CAN_MODE_NORMAL:
-    case CAN_MODE_OBD_CAN2:
-      if ((bool)(mode == CAN_MODE_NORMAL) != (bool)(harness.status == HARNESS_STATUS_FLIPPED)) {
-        // B12,B13: disable normal mode
-        set_gpio_pullup(GPIOB, 12, PULL_NONE);
-        set_gpio_mode(GPIOB, 12, MODE_ANALOG);
-
-        set_gpio_pullup(GPIOB, 13, PULL_NONE);
-        set_gpio_mode(GPIOB, 13, MODE_ANALOG);
-
-        // B5,B6: FDCAN2 mode
-        set_gpio_pullup(GPIOB, 5, PULL_NONE);
-        set_gpio_alternate(GPIOB, 5, GPIO_AF9_FDCAN2);
-
-        set_gpio_pullup(GPIOB, 6, PULL_NONE);
-        set_gpio_alternate(GPIOB, 6, GPIO_AF9_FDCAN2);
-        red_chiplet_enable_can_transceiver(2U, true);
-      } else {
-        // B5,B6: disable normal mode
-        set_gpio_pullup(GPIOB, 5, PULL_NONE);
-        set_gpio_mode(GPIOB, 5, MODE_ANALOG);
-
-        set_gpio_pullup(GPIOB, 6, PULL_NONE);
-        set_gpio_mode(GPIOB, 6, MODE_ANALOG);
-        // B12,B13: FDCAN2 mode
-        set_gpio_pullup(GPIOB, 12, PULL_NONE);
-        set_gpio_alternate(GPIOB, 12, GPIO_AF9_FDCAN2);
-
-        set_gpio_pullup(GPIOB, 13, PULL_NONE);
-        set_gpio_alternate(GPIOB, 13, GPIO_AF9_FDCAN2);
-        red_chiplet_enable_can_transceiver(4U, true);
-      }
-      break;
-    default:
-      break;
-  }
-}
-
-static void red_chiplet_set_fan_or_usb_load_switch(bool enabled) {
-  set_gpio_output(GPIOD, 3, enabled);
-}
-
-static void red_chiplet_init(void) {
-  common_init_gpio();
-
-  // A8, A3: OBD_SBU1_RELAY, OBD_SBU2_RELAY
-  set_gpio_output_type(GPIOA, 8, OUTPUT_TYPE_OPEN_DRAIN);
-  set_gpio_pullup(GPIOA, 8, PULL_NONE);
-  set_gpio_output(GPIOA, 8, 1);
-  set_gpio_mode(GPIOA, 8, MODE_OUTPUT);
-
-  set_gpio_output_type(GPIOA, 3, OUTPUT_TYPE_OPEN_DRAIN);
-  set_gpio_pullup(GPIOA, 3, PULL_NONE);
-  set_gpio_output(GPIOA, 3, 1);
-  set_gpio_mode(GPIOA, 3, MODE_OUTPUT);
-
-  // G11,B10,D7,B11: transceiver enable
-  set_gpio_pullup(GPIOG, 11, PULL_NONE);
-  set_gpio_mode(GPIOG, 11, MODE_OUTPUT);
-
-  set_gpio_pullup(GPIOB, 10, PULL_NONE);
-  set_gpio_mode(GPIOB, 10, MODE_OUTPUT);
-
-  set_gpio_pullup(GPIOD, 7, PULL_NONE);
-  set_gpio_mode(GPIOD, 7, MODE_OUTPUT);
-
-  set_gpio_pullup(GPIOB, 11, PULL_NONE);
-  set_gpio_mode(GPIOB, 11, MODE_OUTPUT);
-
-  // D3: usb load switch
-  set_gpio_pullup(GPIOD, 3, PULL_NONE);
-  set_gpio_mode(GPIOD, 3, MODE_OUTPUT);
-
-  // B0: 5VOUT_S
-  set_gpio_pullup(GPIOB, 0, PULL_NONE);
-  set_gpio_mode(GPIOB, 0, MODE_ANALOG);
-
-  // Initialize harness
-  harness_init();
-
-
-  // Enable CAN transceivers
-  red_chiplet_enable_can_transceivers(true);
-
-  // Disable LEDs
-  red_set_led(LED_RED, false);
-  red_set_led(LED_GREEN, false);
-  red_set_led(LED_BLUE, false);
-
-  // Set normal CAN mode
-  red_chiplet_set_can_mode(CAN_MODE_NORMAL);
-}
-
-static harness_configuration red_chiplet_harness_config = {
-  .has_harness = true,
-  .GPIO_SBU1 = GPIOC,
-  .GPIO_SBU2 = GPIOA,
-  .GPIO_relay_SBU1 = GPIOA,
-  .GPIO_relay_SBU2 = GPIOA,
-  .pin_SBU1 = 4,
-  .pin_SBU2 = 1,
-  .pin_relay_SBU1 = 8,
-  .pin_relay_SBU2 = 3,
-  .adc_channel_SBU1 = 4, // ADC12_INP4
-  .adc_channel_SBU2 = 17 // ADC1_INP17
-};
diff --git a/board/boards/tres.h b/board/boards/tres.h
index f0602ae60b..0de0beb94c 100644
--- a/board/boards/tres.h
+++ b/board/boards/tres.h
@@ -9,7 +9,7 @@
 static bool tres_ir_enabled;
 static bool tres_fan_enabled;
 static void tres_update_fan_ir_power(void) {
-  red_chiplet_set_fan_or_usb_load_switch(tres_ir_enabled || tres_fan_enabled);
+  set_gpio_output(GPIOD, 3, tres_ir_enabled || tres_fan_enabled);
 }
 
 static void tres_set_ir_power(uint8_t percentage){
@@ -29,6 +29,79 @@ static void tres_set_fan_enabled(bool enabled) {
   tres_update_fan_ir_power();
 }
 
+static void tres_enable_can_transceiver(uint8_t transceiver, bool enabled) {
+  switch (transceiver) {
+    case 1U:
+      set_gpio_output(GPIOG, 11, !enabled);
+      break;
+    case 2U:
+      set_gpio_output(GPIOB, 10, !enabled);
+      break;
+    case 3U:
+      set_gpio_output(GPIOD, 7, !enabled);
+      break;
+    case 4U:
+      set_gpio_output(GPIOB, 11, !enabled);
+      break;
+    default:
+      break;
+  }
+}
+
+static void tres_enable_can_transceivers(bool enabled) {
+  uint8_t main_bus = (harness.status == HARNESS_STATUS_FLIPPED) ? 3U : 1U;
+  for (uint8_t i=1U; i<=4U; i++) {
+    // Leave main CAN always on for CAN-based ignition detection
+    if (i == main_bus) {
+      tres_enable_can_transceiver(i, true);
+    } else {
+      tres_enable_can_transceiver(i, enabled);
+    }
+  }
+}
+
+static void tres_set_can_mode(uint8_t mode) {
+  current_board->enable_can_transceiver(2U, false);
+  current_board->enable_can_transceiver(4U, false);
+  switch (mode) {
+    case CAN_MODE_NORMAL:
+    case CAN_MODE_OBD_CAN2:
+      if ((bool)(mode == CAN_MODE_NORMAL) != (bool)(harness.status == HARNESS_STATUS_FLIPPED)) {
+        // B12,B13: disable normal mode
+        set_gpio_pullup(GPIOB, 12, PULL_NONE);
+        set_gpio_mode(GPIOB, 12, MODE_ANALOG);
+
+        set_gpio_pullup(GPIOB, 13, PULL_NONE);
+        set_gpio_mode(GPIOB, 13, MODE_ANALOG);
+
+        // B5,B6: FDCAN2 mode
+        set_gpio_pullup(GPIOB, 5, PULL_NONE);
+        set_gpio_alternate(GPIOB, 5, GPIO_AF9_FDCAN2);
+
+        set_gpio_pullup(GPIOB, 6, PULL_NONE);
+        set_gpio_alternate(GPIOB, 6, GPIO_AF9_FDCAN2);
+        current_board->enable_can_transceiver(2U, true);
+      } else {
+        // B5,B6: disable normal mode
+        set_gpio_pullup(GPIOB, 5, PULL_NONE);
+        set_gpio_mode(GPIOB, 5, MODE_ANALOG);
+
+        set_gpio_pullup(GPIOB, 6, PULL_NONE);
+        set_gpio_mode(GPIOB, 6, MODE_ANALOG);
+        // B12,B13: FDCAN2 mode
+        set_gpio_pullup(GPIOB, 12, PULL_NONE);
+        set_gpio_alternate(GPIOB, 12, GPIO_AF9_FDCAN2);
+
+        set_gpio_pullup(GPIOB, 13, PULL_NONE);
+        set_gpio_alternate(GPIOB, 13, GPIO_AF9_FDCAN2);
+        current_board->enable_can_transceiver(4U, true);
+      }
+      break;
+    default:
+      break;
+  }
+}
+
 static bool tres_read_som_gpio (void) {
   return (get_gpio_input(GPIOC, 2) != 0);
 }
@@ -39,7 +112,32 @@ static void tres_init(void) {
   register_set_bits(&(PWR->CR3), PWR_CR3_USB33DEN);
   while ((PWR->CR3 & PWR_CR3_USB33RDY) == 0U);
 
-  red_chiplet_init();
+  common_init_gpio();
+
+  // A8, A3: OBD_SBU1_RELAY, OBD_SBU2_RELAY
+  set_gpio_output_type(GPIOA, 8, OUTPUT_TYPE_OPEN_DRAIN);
+  set_gpio_pullup(GPIOA, 8, PULL_NONE);
+  set_gpio_output(GPIOA, 8, 1);
+  set_gpio_mode(GPIOA, 8, MODE_OUTPUT);
+
+  set_gpio_output_type(GPIOA, 3, OUTPUT_TYPE_OPEN_DRAIN);
+  set_gpio_pullup(GPIOA, 3, PULL_NONE);
+  set_gpio_output(GPIOA, 3, 1);
+  set_gpio_mode(GPIOA, 3, MODE_OUTPUT);
+
+  // Initialize harness
+  harness_init();
+
+  // Enable CAN transceivers
+  tres_enable_can_transceivers(true);
+
+  // Disable LEDs
+  red_set_led(LED_RED, false);
+  red_set_led(LED_GREEN, false);
+  red_set_led(LED_BLUE, false);
+
+  // Set normal CAN mode
+  tres_set_can_mode(CAN_MODE_NORMAL);
 
   // C2: SOM GPIO used as input (fan control at boot)
   set_gpio_mode(GPIOC, 2, MODE_INPUT);
@@ -74,8 +172,22 @@ static void tres_init(void) {
   clock_source_init();
 }
 
+static harness_configuration tres_harness_config = {
+  .has_harness = true,
+  .GPIO_SBU1 = GPIOC,
+  .GPIO_SBU2 = GPIOA,
+  .GPIO_relay_SBU1 = GPIOA,
+  .GPIO_relay_SBU2 = GPIOA,
+  .pin_SBU1 = 4,
+  .pin_SBU2 = 1,
+  .pin_relay_SBU1 = 8,
+  .pin_relay_SBU2 = 3,
+  .adc_channel_SBU1 = 4, // ADC12_INP4
+  .adc_channel_SBU2 = 17 // ADC1_INP17
+};
+
 board board_tres = {
-  .harness_config = &red_chiplet_harness_config,
+  .harness_config = &tres_harness_config,
   .has_obd = true,
   .has_spi = true,
   .has_canfd = true,
@@ -86,10 +198,10 @@ board board_tres = {
   .fan_enable_cooldown_time = 3U,
   .init = tres_init,
   .init_bootloader = unused_init_bootloader,
-  .enable_can_transceiver = red_chiplet_enable_can_transceiver,
-  .enable_can_transceivers = red_chiplet_enable_can_transceivers,
+  .enable_can_transceiver = tres_enable_can_transceiver,
+  .enable_can_transceivers = tres_enable_can_transceivers,
   .set_led = red_set_led,
-  .set_can_mode = red_chiplet_set_can_mode,
+  .set_can_mode = tres_set_can_mode,
   .check_ignition = red_check_ignition,
   .read_voltage_mV = red_read_voltage_mV,
   .read_current_mA = unused_read_current,
diff --git a/board/stm32h7/board.h b/board/stm32h7/board.h
index ea4812245e..143e431c74 100644
--- a/board/stm32h7/board.h
+++ b/board/stm32h7/board.h
@@ -15,7 +15,6 @@
 #include "stm32h7/sound.h"
 #include "drivers/clock_source.h"
 #include "boards/red.h"
-#include "boards/red_chiplet.h"
 #include "boards/tres.h"
 #include "boards/cuatro.h"