BluePrint Engines B400FKTKX SBC 400/500HP w/ TKX EFI, Pol. Pulley

This 400 combo carries the same 500-horsepower, forged-internals small block as BluePrint's automatic 400 package, trading the automatic for a 5-speed TKX manual. Compression is 10.3:1, torque is 510 lb-ft, and the automatic package's Sniper 2 EFI tuning and polished accessory drive come across unchanged.

What it is built for

This is the version to pick if you want BluePrint's forged 400 internals paired with a clutch pedal instead of an automatic. The aluminum heads, EFI tuning, and ignition timing (10 to 16 degrees initial, 32 to 34 degrees total by 3,500 rpm) match the automatic version.

What to check before ordering

Swapping to a manual means new clutch hardware: a genuine McLeod Super Street Pro single-disc clutch handles engagement here, with a hydraulic throwout bearing, bellhousing, and billet flywheel finishing out the kit, topping out in a tall overdrive top gear for relaxed highway rpm. Verify your pedal assembly, linkage, and tunnel clearance before committing to a five-speed swap. Buyers swapping this into a California vehicle should square the installation with the state's engine-change policy first.

Common questions

Is the compression ratio the same as the automatic version? Yes, 10.3:1 either way.

Does this version use a carburetor? No — fuel injection comes from the Holley Sniper 2 EFI system instead.

What's the torque rating? 510 lb-ft, the same as BluePrint's automatic 400 combo.