
04.5-10 GM Allison SunCoast Boost Modifier Valve
$56.20
- Part Number: A1-LU-BST-04
- Est. Ship Time: Usually Ships By Next Business Day

SSL SECURE
TRANSACTION

AUTHENTIC
PRODUCTS

GUARANTEED PREMIUM
QUALITY

A+ Rating
More from this brand
Starting From $80.00
Starting From $209.00
The TransGo A1-LU-BST-04 Lock-up Boost Valve is engineered for performance built 2004-2010 GM 2500HD/3500HD With Allison 5/6-Speed Transmission. This boost valve is designed to help prevent torque converter slippage under high horsepower and race conditions by increasing your lock-up oil pressure. The increased pressure also prevents your PCM from throwing the P0741 code and putting your transmission in limp mode.
FEATURES:
- For High HP Applications
- Reduces Torque Converter slip
- Significantly Increases Lock-up Oil Pressure
Note: Recommended for high horsepower and race applications only.
Sun Coast part number: A1-LU-BST-04

Edge offers a wide variety of custom dash mounts for various vehicle makes and models. This adaptor allows the CTS2 to fit existing dash pods. New das..
$25.33
Edge offers a wide variety of custom dash mounts for various vehicle makes and models. This adaptor allows the CTS to fit in these custom dash mounts...
$0.00
As the originators of STYLE and performance; we are excited to announce the Universal 2-1/16” Gauge Pillar Adapter for the CS/CTS products. This..
$39.41
PPE has developed the 128043000 Valve Body Recalibration Kit (VBR) to further improve the Allison transmission in your 2006-2010 GM 6.6L Duramax. This..
$125.99
Specifically designed to fit the 2004.5 to 2010 Duramax LLY LBZ and LMM VGT Turbochargers. The blanket covers the entire exhaust housing precisely cov..
$199.00
Fits: 2000-2007 Dodge 2500/3500 (equipped with 47RE or 48RE) The Sun Coast 2000 Shift Solenoid is engineered to enhance the shifting of your..
$143.00
Fits: 2001-2010 GM 6.6L Duramax LB7/LLY/LBZ/LMM (Shallow Trans Pan)
This Suncoast's Allison Shallow Filter Kit for your 2001-2010 GM 6.6L Duramax i..
$80.00
Fits: 2003-2007 Dodge 5.9L CumminsPrevents cracking of the overdrive tail housing - Quick installation, a few minutes and your done- Fits between..
$209.00
Fits: 2007.5-2018 Dodge 6.7L Cummins (Equipped With 68RFE Transmission)This is the Sun Coast Spin on Transmission Filter you need when doing rout..
$28.00
Fits: 2007.5-2018 Dodge 6.7L CumminsUpgrade the transmission in your 2007.5-2018 Dodge 6.7L Cummins with the Sun Coast Billet Piston. This billet..
$150.00
Fits: 2007.5-2018 Dodge 6.7L Cummins( Equipped with 68RFE)24% improvement in hydraulic clamping force over factory drumIncreased friction element..
$1,495.00
Fits: 2007.5-2018 Dodge 6.7L Cummins(Equipped With 68RFE Transmission)The Sun Coast Billet 4C Snap Ring Retainer is a massive upgrade from the st..
$57.00
Fits: 2007.5-2019 Dodge 6.7L Cummins 78RFEKit Includes the Following:New 68RFE Thrust Washer KitNew 68RFE Thrust Bearing Kit68RFE Complete Gasket and ..
Starting From $2,995.00
Fits: 2007.5-2019 Dodge 6.7 Cummins
The factory 68rfe has had many issues with pressure relief check valve system on the transmission pan filters. ..
$199.00
Fits: 2007.5-2021 Dodge 6.7L Cummins (Equipped with 68RFE Transmission)The Sun Coast Billet Snap Ring Retainer can help stop catastrophic damage ..
$62.00
Fits: 2007.5-2021 Dodge Ram 6.7L Cummins It is not uncommon to see the thrust washer that rides on top of the 4C reaction ring gear fatigues and ..
$45.00
Eliminate the weak link of the factory flex plate in your 2011-2016 GM 6.6L Duramax with the Sun Coast A1-BFP-3 Billet Flex Plate. Designed as a direc..
$815.00
Fits: 2011-2017 Ford 6.7L PowerstrokeSFI Certified 29.3Concentric Machined to less than .005Machined to exact tolerances from 4340 round barOne piece ..
$725.00
Fits: 2011-2018 Dodge 6.7L Cummins (Equipped With 68RFE Transmission)
Grey solenoids packs came on all the 2011-2018 68RFE transmissions &..
$535.00
Fits: 2011-2019 Ford 6.7L Powerstroke 6R140
This Sun Coast 6R140-Guardian Guardian Torque Converter is the perfect component for your 2011-2019 For..
$1,895.00
OE replacement F-TCC solenoid for 01-05 GM 6.6L Duramax Allison trucks. Fitment note: 5 speed transmissions onlyAllison: 8683187..
$65.68
Improve your LB7 or LLY's reliability by utilizing our in-house designed and tested kit coupled with our established transmission tuning. We calibrate..
$1,999.00
DHD Built Performance Allison Transmission Valve BodyDHD's Turbo Tony valve body is assembled in house with the best parts in the industry. DHD's 17 y..
$800.00
NEW Design, Steel DIN construction, Does not accept GM compartmental parts or OE switches. DHD 115-510 Dirty Alli-Locker 5-Speed Torque Converter..
$219.00
DHD 115-510U Dirty Alli-Locker 5-Speed Torque Converter Lockup SwitchThe DHD Dirty Alli-Locker torque converter lockup switch was designed to be an ex..
$199.00
2001-2005 Firepunk Proven A750 Allison Transmission
Features:
Great For Mildly Modified Trucks Up To 750HP
2-Year Unlimited Mileage, 100% W..
Starting From $6,995.00
2001-2005 Firepunk Proven A900 Allison Transmission
Features:
Great For Mildly Modified Trucks Up To 900HP
2-Year Unlimited Mileage, 100% W..
Starting From $8,495.00
Replace your leaking transmission lines with our heavy duty, high flow, flexible transmission lines. Our kit is the most complete replacement transmis..
$269.00
Replacement Transmission Cooler Line (short line) for the Fleece Performance Allison Transmission Cooler Line Kit (FPE-TL-LB7-LLY). For use on model y..
$75.99
SoCal Diesel is a company known for providing high-performance diesel parts and accessories, particularly for trucks and heavy-duty vehicles. They foc..
$799.00
DHD 100-175 GM Allison Transfer Case Support Brace 2001-2007 Classic Body
This support can keep your Allison four wheel drive housing from cracking..
$145.00
This 261/263XHD transfer case rebuild kit is perfect for those whom want to tackle the job themselves. Aside from the hard parts, this kit includes ev..
$185.00
Whether you are finishing off your Allison transmission rebuild or having to replace your factory rear adapter housing, this direct replacement adapte..
$1,020.65
Backordered with no ETA (Updated 4/5/25)
For over 3 years DHD's TORQ series fasteners have been setting the benchmark for quality, performance and ..
$74.00
Replacement Transmission Cooler Line (longest length line) for the Fleece Performance Allison Transmission Cooler Line Kits FPE-TL-LB7-LLY and FPE-TL-..
$134.99