Turbo HE221W Turbocharger 4042719 4042718 4242719 for Cummins Engine QSB 3.9L

New: A brand-new, unused, unopened, undamaged item in its original packaging

UPC:607613055900

Replace Part Number:4042719, D4042719, 4042718, 4042714, 4042715, 4042717, 4042720, 4042721, 4955316, 4955317, 4955318, 4955319

Application:Engine: Cummins QSB, QSB Tier-3, 3.9L2006-02 Cummins Industrial with QSB Tier-3 Engine

 

One of the best, but often hardest to get, small frame T25 flange turbos in existence, the Holset HE221W is a proven performer with fantastic all-round performance on road and race cars looking for up to around 380bhp with amazing spool, wide compressor map, and huge efficiency at high boost pressures.

Due to its super fast spool, these turbos are popular on engines as small as 1.4ltr and as large as 2.3ltr, and we’ve seen them numerous times even as twin turbos on things like Toyota 2JZ engines, making 750bhp with great spool.

It’s efficiency at pressure ratios up to 4 has made it an unexpected favourite for race and rally cars using inlet restrictors, as they need turbos with high pressure ratio capability, something that most turbos do not have, see graph in pictures comparing HE221Ws vs a Garrett T3 and Mitsubishi Evo TD05 all on the same engine with same inlet restrictor, showing the HE221W makes far more boost far sooner than these other popular rally turbos.