Performance replacement for your factory diverter valve - designed to recirculate boost pressure like the factory diverter valve, but with a much quicker response
Max gains of up to +47 HP and +55 lb-ft TRQ (Crank); +42 HP and +51 lb-ft TRQ (Wheel) on base models.
Call In Or Chat For Best Price! 5X Entries For Our 25th Anniversary Sweepstakes!
Brand:
ES#:
4430016
Mfg#:
D440-0144
In Stock
11% off MSRP
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
$787.99
This product was last offered at the strikethrough price on 08-19-2026
The FX850 Boasts Increased Clamping Force, Lightened Flywheel, and Increased Torque Capacity!
For Vehicles with Production Date from 02/09 with 6 Bolt Crank
With integrated fuel filter
10X Entries For Our 25th Anniversary Sweepstakes! First time replacement will require ES2848391 Adapter with Production Date Up to 12/2013
Brand:
ES#:
4940609
Mfg#:
13518604231
In Stock
ON SALE!
SAVE 10%
$203.99
This product was last offered at the strikethrough price on 05-02-2026
Significantly lowers backpressure and exhaust gas temperatures (EGTs), allowing the N55 to maintain a flat power curve all the way to redline—effectively turning the 535i into a 700+ whp powerhouse.
For vehicles with Pneumatic Wastegate (PWG)
Black anodized aluminum; designed with the enthusiast driver in mind. The right grip & slip where you need it.
10X Entries For Our 25th Anniversary Sweepstakes!
Brand:
ES#:
3024676
Mfg#:
TMS300502
In Stock
ON SALE!
SAVE 15%
$212.99
This product was last offered at the strikethrough price on 06-13-2026
All the performance upgrade options from the best brands in the business to help build your dreams. Our performance parts catalog is the largest anywhere and constantly growing to keep your build on track.
Lifetime Replacement
