Spool Performance Gen 1 B58 Top Mount Turbocharger Kit | 540i | Up to 1050HP

Engineered for Maximum Power. Built to Last.

The Spool Performance Gen 1 B58 Top Mount Turbo Kit is the most advanced bolt-on power upgrade available for your BMW 540i. Featuring a one-of-a-kind 5-axis machined billet exhaust manifold, this kit delivers explosive power gains up to 1050HP — with a spool response that will leave you breathless.

Why the Billet Manifold Changes Everything

Unlike cast manifolds that crack under heat and restrict flow, our billet manifold is milled from high-strength steel alloy with ultra-short runners that retain maximum heat energy right up to the turbine. The result: faster spool, lower backpressure, and zero cracking — ever.

• 5-axis machined billet construction — lighter and stronger than cast
• Twin scroll wastegate ports optimized via CFD for equalized flow
• Single 45mm Turbosmart wastegate for precise boost control
• Modular design supports multiple turbo configurations

Turbocharger Options

• Spool IFX-900 — Water cooled ceramic ball bearing | 900HP | Lifetime warranty
• Spool IFX-1050 — Water cooled ceramic ball bearing | 1050HP | Lifetime warranty

True Plug & Play — Everything Included

• Billet exhaust manifold
• 45mm Turbosmart wastegate with springs
• 304 stainless steel mandrel bent downpipe & clamps
• 304 stainless steel wastegate dump & clamps
• Aluminum mandrel bent lower charge pipe
• Plug & play water feed/drain and oil feed/drain lines
• T4 manifold studs and bolts
• Silicone couplers and boost control lines

Optional Upgrades

• Cerakote thermal coating for hot parts
• Custom color compressor cover
• Upper charge pipe for stock replacement
• High side catch can & low side PCV cap

Fitment: BMW Gen 1 B58 — 540i. Solenoid not included.