Turbo Kits & Parts for 2015 Audi S5

Buddy Club's new Secu Timer is the very first turbo timer with a security feature. It has all the normal functions of a standard turbo timer, but adds...

AEM's Tru-Boost Boost Controller and Gauge system is designed to function as both a boost gauge and an electronic 2 stage boost controller. As a stand...

Water / methanol injection is designed to allow higher boost and more advanced timing on forced induction 2015 Audi S5s, to get significantly more pow...

GReddy has released an updated version of the venerable Profec line of boost controllers. The new Profec unit is smaller, faster, thinner, and uses a ...

FITMENT NOTE: For the universal blow off valve, it needs to be welded on with the use of a flange. We highly recommend purchasing the GReddy flange (i...

The GrimmSpeed Manual Boost Controller is the most refined manual boost controller on the market. Having spent over a year working closely with the na...

When building a high performance turbo 2015 Audi S5, often an external wastegate is needed. HKS has been building turbo systems for over 30 years, so ...

THIS IS JUST AN INSERT. THE SSQV4 BOV IS SOLD SEPARATELY. The HKS SSQV4 blow off valve produces one of the most distinctive BOV discharge sounds an...

If your application does not include a "Return Kit", then it is designed to vent to atmosphere. However, HKS vent to atmosphere BOVs can be converted ...

This is new & simple 10th Generation HKS Tubo Timer! All our HKS Turbo Timers include harnesses, so you do not need to wire anything yourself, except ...

If you live outside the United States, we cannot ship this product to you. This is because we are a USA Hondata dealer, and we can only sell to USA cu...

IMPORTANT: This KraftWerks Blow Off Valve (BOV) is ONLY designed to work with KraftWerks Supercharger Kits and is only needed on ones that do not alre...