ISR Performance - Silicone Coupler - 4.00" 90 Degree - Black

For big inlet plumbing, the ISR Performance 4.00 inch 90 degree silicone coupler in black turns 4 inch pipe through a right angle. This size is mostly used on turbo compressor inlets and large intake systems where the filter or intake tube has to come off the compressor at 90 degrees to clear the fender, strut tower or radiator. A silicone elbow is the practical way to make that turn: it flexes, it resists heat, and it does not collapse under inlet vacuum the way a thin rubber elbow would.

Specifications

• 90 degree elbow, 4.00 inch inside diameter
• Black silicone construction
• Flexible joint that takes up minor misalignment
• Sold as a single piece

Applications

Universal. Connects two 4.00 inch OD pipes at a right angle, typically on turbo inlets and large intakes, but usable anywhere 4 inch tubing needs to turn. Verify the pipe OD before ordering.

Usage notes

Secure each leg with a 4 inch T-bolt clamp over the straight section. On a compressor inlet, check the elbow after installation and periodically afterward, since a leak here lets unfiltered air in. Keep the elbow clear of sharp edges and heat sources. Weight is roughly 1 lb.

All ISR Performance products are designed for off-road use only.