UMI Performance 240331-B K-Member & Lower A-Arm Suspension Kit Black Powdercoat

The UMI Performance 240331-B is a direct bolt-in tubular K-member and lower A-arm kit designed to reduce front-end weight, improve rigidity, and simplify LSX engine swaps. Fabricated from CNC machined 3/16" thick mild steel and assembled with dual 1-1/2" diameter DOM tubing, this kit delivers a substantial strength advantage over the factory subframe while shedding 25 lbs of front-end weight—putting your existing horsepower to work.

Key Features:

• Direct bolt-in replacement — no cutting or chassis modification required
• MIG and TIG welded construction for maximum weld integrity throughout
• Double tube lower section for superior torsional strength and rigidity
• Reduces front-end weight by 25 lbs compared to the factory K-member
• LSX engine compatible — included fabricated motor mount stands accept factory rubber LS motor mounts, polyurethane mounts, or UMI solid mounts (P/N 2323)
• Modular design — supports coil-over conversion and/or LS motor mounts at minimal additional cost
• Accepts factory and aftermarket lowering springs — stock struts remain compatible
• CNC machined lightening holes in mounting plates reduce weight without sacrificing strength
• Tubular construction provides added exhaust clearance for aftermarket headers and systems
• Durable black powdercoat finish — also available in red powdercoat
• Includes Grade 10.9 mounting hardware for both the K-member and A-arms
• Manufactured in Philipsburg, PA, USA

Lower A-Arm Details:

• Jig-built tubular construction with TIG welded joints
• Polyurethane bushings pre-installed for improved handling response and longevity
• Adjustable steering stops included
• Spring locating pocket for secure spring positioning (see P/N 2031 for complete A-arm details)

Important Notes:

• K-member is designed around the LS1 oil pan and is also compatible with the Holley 302 oil pan. Other oil pan configurations may not provide adequate clearance.
• Can be used with a factory SBC engine by omitting the included LSX motor mount stands.
• If retaining factory LS air conditioning, the A/C compressor must be relocated. An A/C relocation kit from kwikperf.com is recommended.

Engineered for street performance, drag strip duty, and autocross competition, the UMI Performance 240331-B K-member and A-arm kit is a proven upgrade built with pride in the USA. Available in red or black powdercoat to match your build.