Shop
Stage 2
Stage 2: Bolt-On Performance
Breathe free. Downpipes and intake unleash what the tune needs.
Request Quote
Install: 1–2 days
The Stage 2: Bolt-On Performance for the G8X / S58 includes 3 parts, targeting 550–580 WHP on 93 octane.
The G8X / S58 makes 420-450 WHP from the factory. With the Stage 2: Bolt-On Performance, expect approximately 550–580 WHP on 93 octane.
| Fuel | Est. WHP |
|---|---|
| 93 Octane | 550–580 |
| E30 | 620–660 |
| E50 | 700–740 |
| E70+ | 700–740 |
What's Included
MHD ECU Unlock
MHD Tuning
$549
All-in-one flash tuning license with maps for 93, E30, E50, and E85. Flash OTS maps or custom tunes directly from your …
ApexBuilt G8X S58 GESI HFC Downpipes
ApexBuilt
$3000
EPA-approved GESI 400cpsi catted downpipes for G8X M2, M3, and M4. 49-state legal. TIG-welded T304 stainless steel. 20-…
MAD S58 Front Mount Intakes
MAD
$489
Front mount silicone intakes for S58 twin-turbo inline-six. Maximum airflow with enhanced engine sound. Direct fitment …
Ready to build?
Get a custom quote for the Stage 2: Bolt-On Performance installed on your G8X / S58.
Request a Quote Browse All S58 Parts