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Powerplus 520 nozzles are a significant upgrade in fueling for ALH TDIs. They are nominally the same size as .205s, but flow more fuel because of superior tip design. This set of 4 nozzles will work well in a stock TDI, providing about a 15 HP and 25 ft./lb. power increase. They will also work in chip tuned cars, although they may tend to smoke with a stock turbo and a chip. If you're not upgrading your turbo the Sprint 520s may be a better option on a manual-transmission TDI, and the PP357s may work better on an automatic. These fit non-PD engined TDIs. They include injector seals.

Genuine Bosio product, direct from Italy. .205 hole size.

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  • Golf TDI MkIV (A4 chassis) w/ ALH Engine (1999-2003)
  • Jetta TDI MkIII (A3 chassis) w/ AHU Engine (1997-1999)
  • Jetta TDI MkIV (A4 chassis) w/ ALH Engine (1999-2003)
  • Jetta Wagon TDI (A4 chassis) w/ ALH Engine (2002-2003)
  • New Beetle TDI (A4 chassis) w/ ALH Engine (1998-2003)
  • Passat TDI (B4 chassis) w/ AHU/1Z Engine (1996-1997)
Established in Turin Italy in 1929, Fratelli Bosio has become a world-leader in nozzles for diesel engines. All Fratelli Bosio nozzles are made in their own factory in Italy to this day. The Sprint and PowerPlus line are popular upgrades for VE pump Volkswagen TDIs, while the SD line are the enthusiast-choice for replacement nozzles on the older Mercedes Diesels.

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