SPEEDMASTER Outlet Gm Ls Underdrive Harmonic Balancer Damper 840136534952 5.670 Sfi 18.1

( Brand: Speedmaster ), ( Type: 291 Harmonic Balancer ), ( UPC: 840136534952 )

Review SPEEDMASTER Outlet Chevy Gm Ls 5.670 Inch Underdrive Harmonic Balancer Damper Sfi 18.1 fits 2025

SpeedMaster Outlet 840136534952 Harmonic Balancer Damper for Chevy GM LS 5.6L V8 Engines (SF1 18.1 Compliant)

The SpeedMaster Outlet 840136534952 Harmonic Balancer Damper is a premium engine component designed specifically for the Chevrolet GM LS 5.6L V8 engines, offering unparalleled performance and durability. This harmonic balancer is meticulously engineered to absorb torsional vibrations generated by the engine's rotating parts, ensuring a smoother, quieter, and more efficient operation.

Crafted from high-quality materials, this harmonic balancer boasts an impressive SF1 18.1 certification, making it a perfect fit for competitive racing applications. The SF1 18.1 standard ensures the balancer meets the stringent requirements for safety, quality, and performance in motorsport applications.

The SpeedMaster Outlet 840136534952 Harmonic Balancer Damper features a unique underdrive design, which reduces the rotational speed of the accessory drive system, further minimizing vibrations and enhancing overall engine performance. The damper itself is robust and resilient, able to withstand the rigorous demands of high-performance applications.

Installation is a breeze, thanks to the precision-machined hub that fits securely onto the crankshaft, and the accompanying hardware that ensures a snug, vibration-free fit. The SpeedMaster Outlet 840136534952 Harmonic Balancer Damper is more than just an engine component; it's a performance upgrade that delivers smoother power delivery, improved fuel efficiency, and extended engine life.

Invest in the SpeedMaster Outlet 840136534952 Harmonic Balancer Damper today and experience the difference a high-quality, SF1 18.1 certified harmonic balancer can make in your Chevrolet GM LS 5.6L V8 engine. Upgrade your engine today and unleash its full potential!

Product: Speedmaster Outlet 840136534952 Chevy GM LS 5.670 25 Underdrive Harmonic Balancer Damper SFI 18.1

1. SFI 18.1 certified: Meets or exceeds strict safety standards set by the SFI Foundation.

2. Underdrive design: Reduces vibration and engine noise, potentially improving overall performance and longevity.

3. Suitable for Chevy GM LS engines: Compatible with many popular vehicles, ensuring a wide range of application.

4. Potential performance enhancement: By reducing vibration and improving engine balance, the balancer may contribute to improved engine performance.

1. Specific fitment: Ensure the balancer is compatible with your specific vehicle and engine model.

2. Potential installation challenges: Balancer installation can be complex and may require professional assistance.

3. Cost: Compared to stock balancers, this option may be more expensive due to its SFI certification and underdrive design.

The Speedmaster Outlet 840136534952 Chevy GM LS 5.670 25 Underdrive Harmonic Balancer Damper SFI 18.1 offers enhanced safety, reduced vibration, and improved performance for Chevy GM LS engines. However, it may require specific vehicle and engine compatibility, and potential installation challenges.

If you are looking for a high-quality, performance-oriented harmonic balancer for your Chevy GM LS engine, this product could be a good choice. Ensure you have the necessary tools and knowledge for installation, or consider seeking professional assistance. If you are unsure about compatibility, check with the manufacturer or a trusted mechanic before making a purchase.

Details:

Chevy GM LS 5.670 25% Underdrive Harmonic Balancer Damper SFI 18.1.

specifications cranshafengin:

• for makes: Chevy
• for years: 2025
• brand: Speedmaster
• type: 291 Harmonic Balancer
• upc: 840136534952

offer cranshafengin:

• options: Ship-to-home
• availability: In Stock
• sold: 0
• quantity: 1
• started: September 24, 2025

seller cranshafengin:

• # reviews: 86887
• rating: 95.9%
• city: Rialto, California

returns cranshafengin:

• time: 30 Days
• paid by: Seller
• policy: Returns Accepted

shipping cranshafengin:

• cost: $30.27
• transit: 3-7 Days
• carrier: FedEx
• class: Standard, Expedited
• type: Calculated
• service: FedEx Ground / FedEx Home Delivery, FedEx Express Saver

payments cranshafengin:

• credit card: Discover
• wallet: Apple-pay
• other

general cranshafengin:

• Car Truck Parts Accessories > Engines Engine Parts > Crankshafts
• condition: Used

Speedmaster 840136534952 Is Similar To:

• 1-290-002 Speedmaster Chevy Sbc Ci Rotating Assembly Kit Street Series (25.4% similar) Engine stroke in: chevy ABC balanced: no pistons included: yes piston rings and ring oversize in. Speedmaster street series rotating assemblies are the perfect choice for engines up to 500 hp and IDLE-5500 rpm. Piston material: hyper eutectic aluminum style: flat top, with four valve reliefs head ...(November 26th, 2018)
• 4.000 Pce290.1118 Speedmaster Chevy Sbc 350 Forged 2pc I-beam Engine Stroker Rotating Assembly (27.4% similar) Piston material forged aluminum piston dish, with two valve reliefs piston head volume cc since then he has worked on various pit crews in all sorts of racing from circle track racing to alcohol funny cars. He has been building cars since before he was old enough to legally have a license and began ...(February 9th, 2016)
• 1-290-017 Speedmaster Chevy Sbc Ci Rotating Assembly Kit Sportsman Series (25% similar) Balanced: no pistons included: yes piston rings and ring oversize in. Speedmaster sportsman series rotating assemblies are the perfect choice for engines up to 900 hp and rpm. Warranty is 12 months unless stated otherwise in the ad. Over the years, company has grown into a worldwide high performance...(November 3rd, 2019)
• 1-290-003 Speedmaster Chevy Sbc Ci Rotating Assembly Kit Superstreet 840136502562 (29.3% similar) Warranty is 12 months unless stated otherwise in the ad. The ultimate token of precision, Speedmaster is worlds only major parts manufacturer to equip cars from standard replacement top fuel dragsters. The team has shared all finest moments in numerous accolades for its people, products, and ...(December 23rd, 2019)
• Pce276.1014 Speedmaster Forged Steel Crankshaft Small Block Chevy 012933012319 (27.6% similar) Speedmaster PCE276...(May 27th, 2018)
• Pce291.1063 Speedmaster For Dodge Harmonic Damper Balancer 840136534785 (41.4% similar) Harmonic damper balancer by Speedmaster. Speedmaster harmonic dampers are manufactured from forged K1045 low carbon steel and tuned elastic between the two layers of steel. These dampers feature a bonding process which adheres the elastic to.d. Of the inertia ring and.d. Of the hub, utilizing a ...(February 16th, 2022)
• Pce291.1011 Speedmaster Race Series Harmonic Balancer 840136534587 (46.2% similar) Race series harmonic balancer PCE291.1011 by Speedmaster. This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and reliability. New condition...(May 6th, 2022)
• Speedmaster Outlet 840136573630 Ford Sb 302 351 Windsor 28oz External Fluid Damper Harmonic Balancer Sfi 18.1 (56.6% similar) Ford Sb 302 351 Windsor 28OZ external fluid damper harmonic balancer sfi 18.1...(November 27th, 2024)
• Speedmaster Pce291.1102 Oldsmobile 455 6.500 Inch External Sfi-rated Damper Harmonic Balancer (50% similar) Oldsmobile 455 6.500 external sfi-rated damper harmonic balancer, PCE291.1102. They include a strong bonding process, easy-to-read timing marks, and an advanced design to absorb engine vibrations, extending the life of crankshaft bearings for enhanced power torque. Speedmaster harmonic balances are ...(February 14th, 2025)
• Speedmaster Pce291.1085 New Chevy Sbc 350 6.250 Inch Internally Balanced Sfi Harmonic Balancer (53.8% similar) Brand new never used...(March 1st, 2025)
• Speedmaster Pc22205 Big Block Chevy Harmonic Balancer 8 Inch 454 502 (45.6% similar) Harmonic balancer forged low carbon steel high viscosity silicone fluid filled 8 inch diameter externally balanced fits big block chevy engines 454-502 heavy duty design includes painted on timing marks item is new but missing the box and has a couple paint chips...(March 8th, 2025)