High-flow catted downpipes for the 2022-2026 Tundra and 2023-2026 Sequoia 3.4L I-Force / I-Force Max. Engineered for up to 1,000 HP, no check-engine lights.
or as low as $191.25/mo with Affirm
High-flow catted downpipes for the 2022-2026 Tundra and 2023-2026 Sequoia 3.4L I-Force / I-Force Max. Engineered for up to 1,000 HP, no check-engine lights.
SPD’s Alpha Catted Downpipes are built for 3.4L I-Force enthusiasts who refuse to compromise. Engineered to support up to 1,000 horsepower without triggering check engine lights, these downpipes use high-flow ceramic-coated cores to retain emissions integrity while unlocking the turbocharger’s full potential.
Each pipe is mandrel-bent from premium 304 stainless steel with TIG-welded V-band joinery for vibration-immune sealing. Designed and built in Thousand Oaks, CA. Direct bolt-on to OEM cat-back or any aftermarket 3″ mid-pipe.



Direct bolt-on with V-band flanges. Replaces factory primary cat units. Pairs with any 3″ cat-back system. Professional install recommended due to underbody clearance and torque specs on V-bands.
You'll get an instant confirmation email with your part details and invoice. We source from a network of authorized suppliers across the country, so lead times vary by brand and part type — we'll send a tracking number the moment your parts move.
Made-to-order builds — carbon fiber bodywork, fabricated systems, custom finish work — run longer than off-the-shelf items because they're built per order. You'll get progress updates throughout the build.
Need a specific timeline on a part before you buy? Call 805-267-9762 or hit the chat — we'll check vendor stock direct and give you a straight answer.
Absolutely! Once your order ships, you'll get an email with a tracking link so you can follow its journey from our shop to your doorstep.
If your order ships via freight, you'll get a separate email with a direct link to the carrier's tracking page — easy and stress-free.
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