Do the Boost Logic Downpipes for D5 Audi S8 fit the earlier D4 S8?

Not confirmed. Boost Logic lists the part for the Audi S8 with the 4.0T twin-turbo V8 and gives no years, and both the D4 and D5 generations used a 4.0 liter twin-turbo V8. This listing is built around the 2020 and later D5 car, so D4 owners should ask Bulletproof Automotive to confirm fitment of these Downpipes for D5 Audi S8 first.

Can they stay on the car through a turbo upgrade?

Yes. Boost Logic states the downpipes are compatible with stock or upgraded turbo setups and built to withstand high-horsepower applications. If you are planning bigger turbos, confirm with Bulletproof Automotive that the turbo kit you have in mind uses matching outlets before ordering either part.

Will the S8 become loud?

Boost Logic describes a deeper, more aggressive note while keeping the drivability expected of a high-end car. The overall volume depends on the rest of the exhaust, so an S8 that keeps the factory rear section will stay closer to its stock character than one that also runs an aftermarket rear system.

How involved is the installation?

Boost Logic designs the downpipes as a direct bolt-on with OEM-like fitment, so no cutting or welding is required. The 4.0 TFSI places its turbochargers inside the V of the engine, which puts the job deep in the engine bay and under the car, so book it with a shop that knows the engine.

Does the S8 need a tune afterwards?

Boost Logic does not state a tuning requirement and publishes no power figures for these downpipes. Because a downpipe change affects how the engine management reads the exhaust, it is worth talking to your tuner before the install, especially if the car already runs a tune or other upgrades.

Description

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BP PRICING DIFFERENCE

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Description

Boost Logic Downpipes for D5 Audi S8

Boost Logic’s Downpipes for D5 Audi S8 are built for the 4.0-liter twin-turbo V8 in Audi’s flagship sedan, with TIG-welded construction and a direct bolt-on install. Boost Logic shapes each section to cut restriction from the turbochargers back, aiming for faster spool, stronger midrange and a deeper tone while keeping the manners expected of a luxury car. They are built to cope with high-horsepower use and to work with stock or upgraded turbos, so they suit an S8 on a staged power plan as well as one that will stay close to stock.

Features

Reduced restriction from the turbochargers back for faster spool
Stronger midrange response, per Boost Logic
TIG-welded construction built for high-horsepower use
Direct bolt-on with OEM-like fitment
Compatible with stock or upgraded turbochargers

Applications

Audi S8: D5 | 2020-present | 4.0L TFSI V8

Notes

Boost Logic lists the part for the Audi S8 with the 4.0T twin-turbo V8 but gives no years. This listing assumes the 2020 and later D5 car, since the part number sits in the same BL 11030409 series as the C8 RS6 downpipes; D4 owners should confirm fitment before ordering.
Gaskets and mounting hardware are not listed as included
The product photos are the images Boost Logic uses across its 4.0T downpipe range
Boost Logic publishes no dyno figures for the Downpipes for D5 Audi S8

Frequently Asked Questions

Do the Boost Logic Downpipes for D5 Audi S8 fit the earlier D4 S8? Not confirmed. Boost Logic lists the part for the Audi S8 with the 4.0T twin-turbo V8 and gives no years, and both the D4 and D5 generations used a 4.0 liter twin-turbo V8. This listing is built around the 2020 and later D5 car, so D4 owners should ask Bulletproof Automotive to confirm fitment of these Downpipes for D5 Audi S8 first.
Can they stay on the car through a turbo upgrade? Yes. Boost Logic states the downpipes are compatible with stock or upgraded turbo setups and built to withstand high-horsepower applications. If you are planning bigger turbos, confirm with Bulletproof Automotive that the turbo kit you have in mind uses matching outlets before ordering either part.
Will the S8 become loud? Boost Logic describes a deeper, more aggressive note while keeping the drivability expected of a high-end car. The overall volume depends on the rest of the exhaust, so an S8 that keeps the factory rear section will stay closer to its stock character than one that also runs an aftermarket rear system.
How involved is the installation? Boost Logic designs the downpipes as a direct bolt-on with OEM-like fitment, so no cutting or welding is required. The 4.0 TFSI places its turbochargers inside the V of the engine, which puts the job deep in the engine bay and under the car, so book it with a shop that knows the engine.
Does the S8 need a tune afterwards? Boost Logic does not state a tuning requirement and publishes no power figures for these downpipes. Because a downpipe change affects how the engine management reads the exhaust, it is worth talking to your tuner before the install, especially if the car already runs a tune or other upgrades.

About Boost Logic

Boost Logic was founded in Austin, Texas in 2003 and made its name with Toyota Supra turbo kits, setting street car records at 6speed record days and the Texas Mile that stood long after the company stopped racing Supras competitively. It designs turbo systems, titanium exhausts, intercoolers and engine components for the Toyota Supra, Porsche 911 Turbo, Nissan GT-R, Ferrari and Lamborghini, and its R35 GT-R builds have trapped over 180 mph in the quarter mile and over 200 mph in the half mile.

Additional Information

The Bulletproof Automotive website contains many thousands of products purchased in multiple different currencies. All of the prices are entered manually and accurately at the time of entry. Due to the consistently fluctuating international exchange rates, at times prices may not be able to be honored at their original intended rate. We apologize for any inconvenience this may cause, unfortunately our website is unable to compensate dynamically for what can at times be volatile changes in the cost of items due to currency values fluctuating, changes in prices from suppliers, changes in shipping and import duties, and other factors. Rest assured that any order you place on line will be at zero risk to you in this area. If in the event your order cannot be fulfilled at the original intended website price we will offer you a 100% refund, no questions asked. We will continue to do our best to maintain updated prices and we will always continue to offer our price match guarantees as well to ensure our prices are always the best for you. In short, prices may change without notice. It is always advised to give us a call prior to placing your order online to confirm availability and to confirm current pricing.

Shipping Policy

Items that are in stock in the US, either at Bulletproof’s warehouse or at a supplier’s warehouse, are generally delivered within 7-10 days. Special order items from overseas take considerably longer. As a courtesy Bulletproof offers delivery estimates to our customers which take into consideration manufacturer availability and shipping schedule. These estimates represent our best guess based on previous orders from the manufacturer and do not in any way imply a guaranteed delivery window. Many manufacturers work in a “just in time” inventory system and often take 2-20+ weeks to produce an item once an order is submitted. All deliverable items are then sent to our Japanese warehouse. Bulletproof ships a minimum of one full ocean freight container every month from Japan, oftentimes more than one a month. Ocean freight takes an average of 4 weeks. Typically it breaks down to one week in Japan for paperwork and customs, two weeks by boat and one week in US customs/clearance. Due to the wide number of variables between manufacturer and shipping schedules, delivery estimates are simply just that – estimates. We attempt to estimate conservatively and we usually deliver faster than our estimates suggest. It is not Bulletproof’s policy to guarantee delivery time of any special order item, this is impossible for us to do. By ordering you acknowledge that there is no required delivery ETA and an order may not be canceled or altered due to manufacturing or shipping delays, all ETA’s are provided as a best guess only. Please review the full Terms & Conditions here.

BP Pricing Difference

We do pricing a little differently on our JDM brands and we believe in making things simple and clear. No hidden fees or surcharges. Every price you see includes the shipping cost to our office in Los Angeles, California and all the associated taxes/duties/fees for bringing the products into the US. The only shipping you ever pay is from our facility in the US to your location. Be wary of resellers that don’t include the cost of international shipping in their pricing on JDM parts. While we believe we’ll always have the lowest all-in price on JDM products, we offer a price match guarantee for all authentic parts purchased from authorized dealers as well. For many international customers, it’s much more affordable to ship from the USA than from Japan directly, as the air freight and ocean freight costs are typically much less. However, for customers looking to ship directly from Japan outside of North America, or domestically in Japan, we can provide pricing specifically for that scenario. Please do not hesitate to contact us with any pricing questions or concerns. Please email us at sales@bulletproofautomotive.com with any inquiries.

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Boost Logic Downpipes for D5 Audi S8 [BL 11030409-1]

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Boost Logic Downpipes for D5 Audi S8

Features

Applications

Notes

Frequently Asked Questions

About Boost Logic

Reviews