X-Pipes

X-Pipes: the mid-pipe crossover that balances flow and sound

An x-pipe is the crossover section that ties your two exhaust banks together in the middle of the system. By joining the pipes at a single X junction, it lets pressure pulses cross from one bank to the other, which scavenges exhaust more evenly and tends to give a smoother, higher-pitched tone than an h-pipe. On a dual-exhaust V8 it's the piece that sits between the headers or downpipes and the cat-back, and swapping it is one of the more common ways people change both flow and the character of the sound.

What ThreePiece stocks

There are 36 x-pipes in stock right now, spanning 9 brands: BBK, Borla, CORSA Performance, Magnaflow, Stainless Works, Kooks Headers, JBA, Roush and Stainless Bros. BBK is the deepest of the group with 17 pieces in the range. Prices currently run from $165 to $1,825 - that's the live range for what's on the shelf, not a fixed quote. Of the listings, 26 carry specific fitment data, and the coverage leans heavily toward Ford and Chevrolet - the Ford Mustang, Chevrolet Camaro, Ford F-150 and Chevrolet Corvette are the most common vehicles, with product names also referencing Dodge, across model years spanning 1965 to 2025.

How to choose

The first fork is catted versus non-catted. Pieces like the BBK 99-04 Mustang GT/Cobra high-flow x-pipe with catalytic converters and the Kooks Corvette Z06/ZR1 3in catted x-pipe keep converters in the system; others run open for maximum flow. The second is pipe diameter and how the piece connects - the Kooks 11-14 Mustang GT x-pipe requires matching Kooks headers, so read the listing before you buy. Some pieces build in sound control: the Stainless Works F-150 x-pipe integrates a resonator and muffler, while the Corsa GT350 3in double x-pipe and the Corsa Camaro SS 3.0in x-pipe are straight crossover sections meant to pair with a matching cat-back. Budget pieces sit near the low end; the Kooks and Stainless Works stainless assemblies sit at the top.

What else you need with it

An x-pipe is a mid-section, so plan the rest of the system around it. Ahead of it, look at Headers and, if you're keeping converters, Catalytic Converters. Behind it, choose a Cat-Back Exhaust or Axle-Back Exhaust Systems to finish the tone, and grab the connecting hardware from Exhaust Flanges. Browse the full Exhaust section to see how the pieces line up.

Fitment and ordering

Because these pieces are cut for specific vehicles and header setups, confirm the year, model and diameter before ordering - call fitment help at 813-535-5801 or reach us through Contact Us if you're unsure. All orders ship free, and Affirm and Katapult financing is available.

X-Pipes: the mid-pipe crossover that balances flow and sound

An x-pipe is the crossover section that ties your two exhaust banks together in the middle of the system. By joining the pipes at a single X junction, it lets pressure pulses cross from one bank to the other, which scavenges exhaust more evenly and tends to give a smoother, higher-pitched tone than an h-pipe. On a dual-exhaust V8 it's the piece that sits between the headers or downpipes and the cat-back, and swapping it is one of the more common ways people change both flow and the character of the sound.

What ThreePiece stocks

There are 36 x-pipes in stock right now, spanning 9 brands: BBK, Borla, CORSA Performance, Magnaflow, Stainless Works, Kooks Headers, JBA, Roush and Stainless Bros. BBK is the deepest of the group with 17 pieces in the range. Prices currently run from $165 to $1,825 - that's the live range for what's on the shelf, not a fixed quote. Of the listings, 26 carry specific fitment data, and the coverage leans heavily toward Ford and Chevrolet - the Ford Mustang, Chevrolet Camaro, Ford F-150 and Chevrolet Corvette are the most common vehicles, with product names also referencing Dodge, across model years spanning 1965 to 2025.

How to choose

The first fork is catted versus non-catted. Pieces like the BBK 99-04 Mustang GT/Cobra high-flow x-pipe with catalytic converters and the Kooks Corvette Z06/ZR1 3in catted x-pipe keep converters in the system; others run open for maximum flow. The second is pipe diameter and how the piece connects - the Kooks 11-14 Mustang GT x-pipe requires matching Kooks headers, so read the listing before you buy. Some pieces build in sound control: the Stainless Works F-150 x-pipe integrates a resonator and muffler, while the Corsa GT350 3in double x-pipe and the Corsa Camaro SS 3.0in x-pipe are straight crossover sections meant to pair with a matching cat-back. Budget pieces sit near the low end; the Kooks and Stainless Works stainless assemblies sit at the top.

What else you need with it

An x-pipe is a mid-section, so plan the rest of the system around it. Ahead of it, look at Headers and, if you're keeping converters, Catalytic Converters. Behind it, choose a Cat-Back Exhaust or Axle-Back Exhaust Systems to finish the tone, and grab the connecting hardware from Exhaust Flanges. Browse the full Exhaust section to see how the pieces line up.

Fitment and ordering

Because these pieces are cut for specific vehicles and header setups, confirm the year, model and diameter before ordering - call fitment help at 813-535-5801 or reach us through Contact Us if you're unsure. All orders ship free, and Affirm and Katapult financing is available.