Vorsprung V2 Test Pipes, Audi B8/B8.5 S4, S5, A6, A7, A8, Q5, SQ5 3.0T Supercharged

V2 is here! Single mandrel bent 2.0mm 304 stainless piping, integrated dual layer heat shielding, TIG welded, and fully back-purged. Less welds + thicker pipes + heat shielding = unparalleled durability, zero rasp, and lower IATs. We beat the other guys, NO CAP (see what we did there?).

These are catless Audi S4 test pipes (also called race pipes, front pipes, or cat delete pipes) for the B8/B8.5 S4 3.0T supercharged. They replace the factory front catalytic converters between the exhaust manifolds and the downpipes, and bolt up to OEM or aftermarket 2.5" downpipes. The same pipes fit the S5, A4/A5 (B8.5, non-US), A6, A7, A8, Q5, and SQ5 with the 3.0 TFSI supercharged V6.

Built Right, Not Just Built: The Ultimate B8/B8.5 S4 Decat Solution

Most Audi S4 and 3.0T supercharged test pipes on the market cut corners with thin materials, weak welds, and inflated price tags. At Vorsprung Autowerk, we weren't impressed. So, we engineered the V2 Series: the most durable, reliable, and headache-free decat solution ever built for the Audi B8/B8.5 S4, S5, C7 A6, A7, D4 A8, and Q5/SQ5 platforms.

By combining the best features from every 3.0T test pipe on the market and removing the compromises, we've created a heavy-duty set that makes every other option look unnecessary. And we didn't slap an "Audi Tax" on it either.

Why Choose Vorsprung V2 Test Pipes for Your S4?

Our V2 design focuses on three core pillars: Durability, Sound Quality, and Heat Management.

• ✅ VORSPRUNG Spec 2.0mm Wall Thickness: While the industry norm is a thin 1.56mm, we use heavy-duty 2.0mm T304 stainless steel. Thicker walls mean maximum durability, significantly less "exhaust rasp," and superior heat retention for better exhaust velocity.
• ✅ True 2.5" Diameter: Full 2.5" tubing and flanges from manifold to downpipe, so there are no hidden choke points.
• ✅ Single Mandrel Bent Piping: One-piece mandrel bends eliminate unnecessary welds. Fewer failure points, unrestricted flow, and a stronger overall exhaust path.
• ✅ Integrated Dual-Layer Metal Heat Shielding: Standard on every V2 pipe, not a pricey add-on. Lower your Intake Air Temperatures (IATs) and protect surrounding engine bay components.
• ✅ TIG Welded & Back Purged: Back-purging keeps internal welds smooth and structurally sound to handle high-boost, dual-pulley, Stage 2+ applications.
• ✅ Reinforced 10mm Flanges: Internal and external reinforcement for a perfect OEM-style fit that will not warp or leak under extreme exhaust heat.
• ✅ Vibration Reduction: Reinforced mounting points keep the system rigid, reducing stress and fatigue on your factory manifold studs.
• ✅ Complete Kit: All hardware and gaskets included. Open the box, bolt them in.

Chasing a clean CEL-free setup? O2 spacers with Euro 6 coating are available here.

Audi S4 Test Pipe Technical Specifications

Engineered for Endurance, Guaranteed for Life

A lifetime warranty is only useful if you don't have to use it. Replacing test pipes on a 3.0T is a labor-intensive "subframe-drop" job, and the last thing you want is to do it twice.

That's why every set of Vorsprung Autowerk V2 test pipes carries a Lifetime Warranty. We're confident our 2.0mm, reinforced design will never leave you stranded or facing expensive re-installation labor.

Stop settling for thin pipes and weak welds. Upgrade to the Vorsprung V2, the last set of test pipes your Audi S4, S5, A6, A7, A8, or Q5 will ever need.

Audi S4 Test Pipes FAQ

Complete Your S4 Exhaust Build

Test pipes are frequently paired with:

• HEH Headers V2 for Audi 3.0T
• Euro 6 O2 Spacers
• High Flow Cats, if you'd rather keep catalytic converters than run fully catless.
• Ported Supercharger Service

Drive the difference. Drive Vorsprung.