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Gravedigger 07-13 Mazdaspeed 3 Under Route Intercooler Piping Kit
CURRENTLY IN PRE-ORDER ESTIMATED SHIP DATE JUNE 1, 2026, EARLY CANCELLATIONS ARE SUBJECT TO CANCELLATION FEES
Clean up the engine bay and shorten your charge path with the Gravedigger Under-Route Intercooler Piping Kit for the 2007–2013 Mazdaspeed 3. Built from 2.5” aluminum piping (not silicone), this kit routes the hot side under the engine and supports 2.5” or 3.0” inlet/outlet intercoolers including popular Mishimoto and Treadstone cores.
Key Features
- Under route hot side routing for a cleaner engine bay, shorter path, and lower IATs!
- All aluminum piping to avoid expansion/collapse issues seen with all silicone kits.
- Compatible with 2.5” or 3.0” inlet/outlet FMIC cores
-
Two options available:
- Hot Side Only (use with existing FMIC cold-side piping kits)
- Full Kit (includes cold side from FMIC outlet to throttle body)
- Stock style BPV flange (fits GoFastBits, Turbosmart, etc.; HKS/Tial via adapter)
- Lifetime warranty against manufacturer defects
Fitment
- 2007 - 2009 Gen 1 Mazdaspeed 3 (BK)
- 2010 - 2013 Gen 2 Mazdaspeed 3 (BL)
- Does not fit Mazdaspeed 6 (transfer case prevents required turbo rotation)
Turbo / Compatibility Notes
- Confirmed compatible: BNR S3 - S5 turbochargers / CST4 - 6
- Not confirmed: Garrett / ATP (fitment not yet verified)
Intercooler Compatibility
Designed for front-mount intercooler setups using 2.5” or 3.0” inlet/outlet sizing.
Compatible examples include but not limited to:
Compatible examples include but not limited to:
- Mishimoto M-Line
- Mishimoto R-Line
- Treadstone TR8
- Treadstone TR1035 / TR1045
What’s Included
Hot Side Only (Under Route)
- 2-piece hot-side intercooler piping
- 4-ply couplers
- T-bolt clamps
Full Kit (Hot Side + Cold Side)
- Everything in Hot Side Only, plus:
- 1-piece cold-side piping (FMIC outlet to throttle body)
- 4-ply couplers
- T-bolt clamps
Optional Add-On
- BNR Rotated Turbo Bracket (sold separately)
Specs
- Diameter: 2.5”
- Material: Aluminum piping (silicone couplers)
- Finish: Polished aluminum
- Powder coat: Available by email quote
- BPV/BOV flange: Stock-style flange (GFB/Turbosmart compatible; HKS/Tial via adapter)
Installation Notes
- Install time: ~2-3 hours
- Difficulty: 4/5 (turbo clocking required)
- Minor trimming: slight fog light trimming required (passenger side)
CURRENTLY IN PRE-ORDER ESTIMATED SHIP DATE JUNE 1, 2026, EARLY CANCELLATIONS ARE SUBJECT TO CANCELLATION FEES
Clean up the engine bay and shorten your charge path with the Gravedigger Under-Route Intercooler Piping Kit for the 2007–2013 Mazdaspeed 3. Built from 2.5” aluminum piping (not silicone), this kit routes the hot side under the engine and supports 2.5” or 3.0” inlet/outlet intercoolers including popular Mishimoto and Treadstone cores.
Key Features
- Under route hot side routing for a cleaner engine bay, shorter path, and lower IATs!
- All aluminum piping to avoid expansion/collapse issues seen with all silicone kits.
- Compatible with 2.5” or 3.0” inlet/outlet FMIC cores
-
Two options available:
- Hot Side Only (use with existing FMIC cold-side piping kits)
- Full Kit (includes cold side from FMIC outlet to throttle body)
- Stock style BPV flange (fits GoFastBits, Turbosmart, etc.; HKS/Tial via adapter)
- Lifetime warranty against manufacturer defects
Fitment
- 2007 - 2009 Gen 1 Mazdaspeed 3 (BK)
- 2010 - 2013 Gen 2 Mazdaspeed 3 (BL)
- Does not fit Mazdaspeed 6 (transfer case prevents required turbo rotation)
Turbo / Compatibility Notes
- Confirmed compatible: BNR S3 - S5 turbochargers / CST4 - 6
- Not confirmed: Garrett / ATP (fitment not yet verified)
Intercooler Compatibility
Designed for front-mount intercooler setups using 2.5” or 3.0” inlet/outlet sizing.
Compatible examples include but not limited to:
Compatible examples include but not limited to:
- Mishimoto M-Line
- Mishimoto R-Line
- Treadstone TR8
- Treadstone TR1035 / TR1045
What’s Included
Hot Side Only (Under Route)
- 2-piece hot-side intercooler piping
- 4-ply couplers
- T-bolt clamps
Full Kit (Hot Side + Cold Side)
- Everything in Hot Side Only, plus:
- 1-piece cold-side piping (FMIC outlet to throttle body)
- 4-ply couplers
- T-bolt clamps
Optional Add-On
- BNR Rotated Turbo Bracket (sold separately)
Specs
- Diameter: 2.5”
- Material: Aluminum piping (silicone couplers)
- Finish: Polished aluminum
- Powder coat: Available by email quote
- BPV/BOV flange: Stock-style flange (GFB/Turbosmart compatible; HKS/Tial via adapter)
Installation Notes
- Install time: ~2-3 hours
- Difficulty: 4/5 (turbo clocking required)
- Minor trimming: slight fog light trimming required (passenger side)
Select Select Piping Kit
Select Select Intercooler Couplers
Select Add BNR Rotated Bracket
From $142.50
Original: $474.99
-70%Gravedigger 07-13 Mazdaspeed 3 Under Route Intercooler Piping Kit—
$474.99
$142.50Description
CURRENTLY IN PRE-ORDER ESTIMATED SHIP DATE JUNE 1, 2026, EARLY CANCELLATIONS ARE SUBJECT TO CANCELLATION FEES
Clean up the engine bay and shorten your charge path with the Gravedigger Under-Route Intercooler Piping Kit for the 2007–2013 Mazdaspeed 3. Built from 2.5” aluminum piping (not silicone), this kit routes the hot side under the engine and supports 2.5” or 3.0” inlet/outlet intercoolers including popular Mishimoto and Treadstone cores.
Key Features
- Under route hot side routing for a cleaner engine bay, shorter path, and lower IATs!
- All aluminum piping to avoid expansion/collapse issues seen with all silicone kits.
- Compatible with 2.5” or 3.0” inlet/outlet FMIC cores
-
Two options available:
- Hot Side Only (use with existing FMIC cold-side piping kits)
- Full Kit (includes cold side from FMIC outlet to throttle body)
- Stock style BPV flange (fits GoFastBits, Turbosmart, etc.; HKS/Tial via adapter)
- Lifetime warranty against manufacturer defects
Fitment
- 2007 - 2009 Gen 1 Mazdaspeed 3 (BK)
- 2010 - 2013 Gen 2 Mazdaspeed 3 (BL)
- Does not fit Mazdaspeed 6 (transfer case prevents required turbo rotation)
Turbo / Compatibility Notes
- Confirmed compatible: BNR S3 - S5 turbochargers / CST4 - 6
- Not confirmed: Garrett / ATP (fitment not yet verified)
Intercooler Compatibility
Designed for front-mount intercooler setups using 2.5” or 3.0” inlet/outlet sizing.
Compatible examples include but not limited to:
Compatible examples include but not limited to:
- Mishimoto M-Line
- Mishimoto R-Line
- Treadstone TR8
- Treadstone TR1035 / TR1045
What’s Included
Hot Side Only (Under Route)
- 2-piece hot-side intercooler piping
- 4-ply couplers
- T-bolt clamps
Full Kit (Hot Side + Cold Side)
- Everything in Hot Side Only, plus:
- 1-piece cold-side piping (FMIC outlet to throttle body)
- 4-ply couplers
- T-bolt clamps
Optional Add-On
- BNR Rotated Turbo Bracket (sold separately)
Specs
- Diameter: 2.5”
- Material: Aluminum piping (silicone couplers)
- Finish: Polished aluminum
- Powder coat: Available by email quote
- BPV/BOV flange: Stock-style flange (GFB/Turbosmart compatible; HKS/Tial via adapter)
Installation Notes
- Install time: ~2-3 hours
- Difficulty: 4/5 (turbo clocking required)
- Minor trimming: slight fog light trimming required (passenger side)