Product image 1
HomeStore

SPELAB 3 Inch Plum-shaped Unilateral Manual Exhaust Cutout Kit

SPELAB 3 Inch Plum-shaped Unilateral Manual Exhaust Cutout Kit

Application:

This kit is compatible with all vehicles

Note: please make sure you have enough space to install before purchase and make sure your exhaust size is same with the exhaust cutout.

Features:

  • Lightweight CNC Machined Anodized T-6061 Aircraft Aluminum Alloy
  • High Polished Finish
  • Tig Welded Construction

Details and Specifics:

  • Brand Name: SPELAB
  • Model Number: SPES00118S3.0
  • Valve Material: Aluminium Alloy
  • Pipe Material: 304 Stainless Steel
  • Mounting Position: Medium
  • Special Features: Make Amazing Sound/Add Extra Power
  • Type: Dissipative Muffler
  • Size: 3.0 inch
  • Color: Silver
  • Weight: 3460g
  • Function: Adjust car sound

Package included:

  • 1 X Electric Exhaust Cut Out Kit with Gear Driven Motor
  • 1 X Stainless Steel 10" Y-pipe
  • 1 X 45-Degree Stainless Steel Elbow Dump Pipe
  • 1 X Manual switch
  • 1 X 12ft Wiring Harness
  • 1 X Stainless Steel Flange Adaptor
  • 1 X Aluminum V-Band Clamp
  • 2 X Flange Gaskets
  • 1 X Set of 1.50" Bolts with Lock Washers and Nuts

FAQ

What makes a plum-shaped exhaust cutout different from a standard butterfly valve cutout?

The plum-shaped valve's asymmetric disc improves airflow geometry compared to a round butterfly, reducing turbulence at partial openings and maintaining better low-end torque when closed.

Is the plum-shaped cutout electric or manual?

This SPELAB unit is a manual single-side cutout — you toggle it open or closed by hand. Electric remote-control versions are also available in the SPELAB exhaust cutout catalog.

What vehicles and exhaust sizes is the 3" plum-shaped cutout designed for?

The 3" size fits most V8 diesel trucks and performance gas builds with 3" exhaust systems. Confirm your pipe inner diameter before ordering — some systems use 2.75" or 3" ID piping.

Where in the exhaust system should I mount a cutout valve?

Install between the engine/header collector and the muffler inlet for maximum sound control. This placement lets you run the muffler for street driving and bypass it for open-valve track mode.

Will the plum-shaped cutout handle the heat from a tuned diesel truck?

Yes. The aluminum alloy valve and stainless steel pipe construction handle repeated heat cycles. At extreme sustained high load, occasional use of the open valve actually reduces exhaust gas temperature by lowering back-pressure.

Do I need to weld the cutout in, or does it clamp?

Cutout bodies are designed for weld-in installation for a leak-free seal under pressure. Some kits include flanges for bolted installation — welding provides the most secure and rattle-free long-term connection.

$62.61

Original: $178.88

-65%
SPELAB 3 Inch Plum-shaped Unilateral Manual Exhaust Cutout Kit—

$178.88

$62.61

Product Information

Shipping & Returns

Description

Application:

This kit is compatible with all vehicles

Note: please make sure you have enough space to install before purchase and make sure your exhaust size is same with the exhaust cutout.

Features:

  • Lightweight CNC Machined Anodized T-6061 Aircraft Aluminum Alloy
  • High Polished Finish
  • Tig Welded Construction

Details and Specifics:

  • Brand Name: SPELAB
  • Model Number: SPES00118S3.0
  • Valve Material: Aluminium Alloy
  • Pipe Material: 304 Stainless Steel
  • Mounting Position: Medium
  • Special Features: Make Amazing Sound/Add Extra Power
  • Type: Dissipative Muffler
  • Size: 3.0 inch
  • Color: Silver
  • Weight: 3460g
  • Function: Adjust car sound

Package included:

  • 1 X Electric Exhaust Cut Out Kit with Gear Driven Motor
  • 1 X Stainless Steel 10" Y-pipe
  • 1 X 45-Degree Stainless Steel Elbow Dump Pipe
  • 1 X Manual switch
  • 1 X 12ft Wiring Harness
  • 1 X Stainless Steel Flange Adaptor
  • 1 X Aluminum V-Band Clamp
  • 2 X Flange Gaskets
  • 1 X Set of 1.50" Bolts with Lock Washers and Nuts

FAQ

What makes a plum-shaped exhaust cutout different from a standard butterfly valve cutout?

The plum-shaped valve's asymmetric disc improves airflow geometry compared to a round butterfly, reducing turbulence at partial openings and maintaining better low-end torque when closed.

Is the plum-shaped cutout electric or manual?

This SPELAB unit is a manual single-side cutout — you toggle it open or closed by hand. Electric remote-control versions are also available in the SPELAB exhaust cutout catalog.

What vehicles and exhaust sizes is the 3" plum-shaped cutout designed for?

The 3" size fits most V8 diesel trucks and performance gas builds with 3" exhaust systems. Confirm your pipe inner diameter before ordering — some systems use 2.75" or 3" ID piping.

Where in the exhaust system should I mount a cutout valve?

Install between the engine/header collector and the muffler inlet for maximum sound control. This placement lets you run the muffler for street driving and bypass it for open-valve track mode.

Will the plum-shaped cutout handle the heat from a tuned diesel truck?

Yes. The aluminum alloy valve and stainless steel pipe construction handle repeated heat cycles. At extreme sustained high load, occasional use of the open valve actually reduces exhaust gas temperature by lowering back-pressure.

Do I need to weld the cutout in, or does it clamp?

Cutout bodies are designed for weld-in installation for a leak-free seal under pressure. Some kits include flanges for bolted installation — welding provides the most secure and rattle-free long-term connection.