MagnaFlow Exhaust, Mufflers & Cat Converters - Quality

MagnaFlow Performance Exhaust Diesel Turbo Downpipe 15399

MagnaFlow Performance Exhaust Diesel Turbo Downpipe 15399 - Main image
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$137.94 $209 In stock

Category: Performance Exhaust

The MagnaFlow Performance Exhaust Diesel Turbo Downpipe 15399 is a 4in. diameter mandrel bent stainless steel pipe that is weight-optimized with superior flow characteristics and performance. Each performance pipe is produced using precision CNC robotic manufacturing techniques and features 100% durable, corrosion resistant stainless steel construction. Professional installation is highly recommended.

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Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

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Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (4.8 / 5 · 5 reviews)

Ellie ★★★★★

I’d been dealing with a noticeable drop in throttle response, but after swapping in this 4-inch downpipe, the turbo spools noticeably quicker and the exhaust note is deeper. Installation was straightforward, and the stainless steel mandrel bends look quality.

James U. ★★★★★

The mandrel bent stainless steel construction feels incredibly solid, and the weight savings over my old pipe are immediately noticeable. My truck's turbo spools faster and the exhaust note has a deeper, cleaner tone now.

Olivia ★★★★★

The 4-inch diameter really opened up the exhaust flow on my diesel truck, and the mandrel bent stainless feels solid. Installing it took about an hour, but the improved turbo response was worth it.

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