8HPX High Stall Upgraded Torque converter

$1,850.00

Brand: Spool Performance

Availability: 9 In Stock
SKU: SP-CD-TQCNV-4
Barcode: SP-CD-TQCNV-4

SEND IN CORE FOR EXCHANGE

SHIP SPOOL CONVERTER WITH REFUNDABLE CORE DEPOSIT [+$500]

Qty:

Tags: 8hp70 , 8hp75 , 8hp76 , B58 , B58 Engine Modifications , b58 gen 1 , b58 gen1 , b58 gen2 , B58 tu , B58tu , BMW , BMW S58 Engine Upgrades , BMW S58 Upgrades , g30 , g80 , G80 M3 , G80 M3 Performance Upgrades , g80 transmission , g82 , G82 M4 , g82 transmission , G83 , g87 , G87 M2 , gen 1 b58 , gen1 B58 , Gen2 B58 , S58 , s58 transmission , stage 2 transmission , upgraded transmission , zf

Description

Built for serious BMW performance enthusiasts, the Spool Performance Upgraded High-Stall Torque Converter is the launch-control weapon your 8HP transmission’s been waiting for. Whether you're drag racing, roll racing, or street tuning, this converter is engineered to deliver brutal off-the-line acceleration with refined drivability, making it the perfect match for high-horsepower BMW builds.

4000 RPM stall speed for optimized launch control and boost building
Precision-machined billet stator engineered by Circle D Torque Converters
Upgraded multi-disc lockup clutch pack with enhanced steels and friction materials
High-temp resistant construction rated for over 1000 HP abuse
Fully balanced and tested for seamless integration with 8HP internals

Expect faster 60-foot times, better turbo spool, and more consistent power delivery under load. The 4000 RPM stall allows engines to reach peak torque before launch, giving your BMW the edge in both straight-line performance and roll races. Reinforced clutches provide firm, confident lockup at higher power levels without slip or heat-related degradation.

This torque converter features a billet stator designed by Circle D Torque Converters, an industry leader with over 20 years of experience in building race-proven converters. Circle D's advanced CFD (Computational Fluid Dynamics) modeling and simulation tools allow for precise stator geometry optimization, ensuring maximum torque multiplication and efficiency across a range of driving conditions. Paired with Spool Performance’s BMW-specific drivetrain expertise, the result is a converter that delivers unmatched performance, reliability, and refinement.

Direct fit for all BMW applications equipped with 8HP45, 8HP50, 8HP70, and 8HP75 transmissions. Ideal for B58, S58, N63, and S63-powered builds running upgraded turbos, ethanol blends, or drag setups.

Professional installation recommended. TCU tuning may be required for optimal performance and shift strategy.

CORE OPTIONS:

Send in core for exchange: Ship your OEM torque converter to Spool Performance in exchange for Spool Upgraded High Stall Torque converter. Avoids $500 Core deposit.
Ship Spool Upgraded Converter with Refundable Core deposit: Spool will ship upgraded torque converter and process $500 core deposit once OEM core is returned.

For core shipping instructions please email customer_service@spoolperformance.us.

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