Audi 3.0T Tech Guides & News

Audi exhaust system high flow catalytic converters for B8 B8.5 S4 S5 Q5 SQ5 3.0T supercharged
Audi A4

Audi A4 Exhaust System: Upgrade Guide by Generation, Sound and Legality

An honest Audi A4 exhaust system guide: how the layout changes from B8 to B9,...
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Vorsprung OE Ultimate Under Supercharger Kit for Audi 3.0T, GPS under supercharger kit alternative
3.0T

GPS Under Supercharger Kit Alternative: Same OE Parts, Up to $225 Less (Audi 3.0T B8, B8.5, C7, CREC)

Shopping the GPS Under Supercharger Kit for your Audi 3.0T? We compared parts lists and...
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Titanium intake V2 performance part for Audi S4 B8 B8.5 3.0T supercharged
Audi S4

Performance Parts for Audi S4: What to Buy at Every Budget

A category-by-category guide to performance parts for Audi S4 models, B8/B8.5 and B9, with clear...
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GP Ice heat exchanger v2 for Audi 3.0T supercharged B8 S4, S5, SQ5 and C7 A6, A7 replacement
Audi 3.0T

Heat Exchanger Replacement Cost: Audi 3.0T Parts, Labor and Dealer vs DIY

What does an Audi 3.0T supercharger heat exchanger replacement really cost? Parts, labor, dealer vs...
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Audi RS5 tuning support: Haken Street rear big brake kit for B8 and B9 Audi RS5
Audi RS5

Audi RS5 Tuning: B8 4.2 V8 vs B9 2.9T, and What Each One Really Needs

Audi RS5 tuning compared across the B8 4.2 naturally aspirated V8 and the B9 2.9T...
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Billet rear differential carrier inserts for Audi B8 B8.5 and C7 quattro drivetrains
Audi quattro

Torsen vs Haldex: Which Audi quattro System Does Your Car Have?

Torsen vs Haldex, minus the forum myths: how Audi's longitudinal Torsen and crown-gear quattro differs...
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High flow catalytic converter downpipe for Audi 4M SQ7, SQ8 and RSQ8 4.0T V8
Audi 3.0T

Are High Flow Catalytic Converters Legal? EPA, CARB and Inspection Rules

Are high flow catalytic converters legal? It depends on federal rules, your state, the exact...
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4 bar MAP sensors for turbo Audi S4 B9 EA839 3.0T
Audi S4

Turbo Audi S4: B9 EA839 Upgrades and the Truth About B8 Swaps

The turbo Audi S4 explained: how to upgrade the B9/B9.5 EA839 safely with MAP sensors,...
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High-flow port fuel injectors for auxiliary port injection on Audi 3.0T and 4.0T direct injection engines
Direct Injection

550cc Injectors for Audi: Port vs Direct Injection on the 3.0T and 4.0T

Thinking about 550cc injectors for your Audi? Here is why Bosch-style 550cc port injectors do...
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Three bolt exhaust flange for 3 in ID tubing with triangle bolt pattern
3-Bolt Flange

Three Bolt Exhaust Flange: Dimensions, Bolt Patterns, Gaskets and Repair

Everything about the three bolt exhaust flange: common bolt circle dimensions by pipe size, how...
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Vorsprung VF-10 two-tone forged wheel on 5x112 Audi fitment for B8, B9, C7 and C8
Audi Bolt Pattern

Audi Bolt Pattern and Wheel Fitment Guide: Center Bore, Offset and Lug Seats

The Audi wheel fitment guide for B8, B9, C7, C8 and 4M Q7 owners: bolt...
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Billet aluminum thermostat housing for Audi 3.0T EA837 Gen 1 to use with G13 coolant service
Audi 3.0T

G13 Coolant for Audi: Chemistry, Mixing Rules and Flush-and-Fill Tips

G13 coolant is not just "the purple stuff." Learn what TL 774-J actually is, what...
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