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Signature Composites

BMW G8X J-Pipe Catback Valved Exhaust

BMW G8X J-Pipe Catback Exhaust for the M3 (G80) & M4 (G82)
BMW G8X J-Pipe Catback Exhaust for the M3 (G80) & M4 (G82) - image 2
BMW G8X J-Pipe Catback Exhaust for the M3 (G80) & M4 (G82) - image 3
BMW G8X J-Pipe Catback Exhaust for the M3 (G80) & M4 (G82) - image 4
BMW G8X J-Pipe Catback Exhaust for the M3 (G80) & M4 (G82) - image 5
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Material
$3,149.99 $3,499.99 10% OFF · Save $350.00
Made to order — ships in 6-10 weeks
1
Fitment guaranteed or your money back
Returns & exchanges available
Built to spec — OEM-grade quality
Free Install — Limited Time Only

Installation included at our Dallas–Fort Worth shop — you pay for the part, not the labor.

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Part of a Build Kit

G8X M3/M4 Signature Carbon Kit Builder

Build it your way — choose the carbon parts that complete your G8X

$3,208.43 $3,564.93 10% OFF · Save $356.50

Build Kit

Take your G8X valved exhaust system to the next level with a performance-focused J-pipe catback exhaust engineered to free up the S58 soundtrack and reduce back pressure compared to the restrictive factory system. Available in titanium or 304 stainless steel, it combines premium construction with a lightweight, motorsport-inspired design for improved flow and a more aggressive exhaust character.

  • Titanium or 304 stainless steel construction
  • Valved for switchable street/track sound
  • Direct catback fitment — no modification required
  • J-pipe design for a deeper, more aggressive tone
  • Mandrel-bent piping for optimal flow

A premium catback upgrade designed to unlock a more aggressive S58 sound while improving exhaust flow and delivering a true motorsport-inspired feel.

SKU SC.G8X.EXH.JCB.TI

Vehicle Fitment