4-Port Heater & A/C Firewall Bulkhead

Name: 4-Port Heater & A/C Firewall Bulkhead
Brand: BILLET SPECIALTIES
SKU: 135-BLK66920
Price: 107.95 USD
Availability: InStock

^$107⁹⁵

Ships on Sep 14, 2026

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A/C & Heater

(1) -6 AN Male to -6 AN Male Port
(3) -10 AN Male to -10 AN Male Ports
6061-T6 Billet Aluminum
Black Anodized Finish

Fitment Notes:
- Stainless heater hose applications will require AN to male o-ring adapters
- Works with 5/8 in. heater hose
- Hose end fittings sold separately

Firewall Bulkhead Ports for a Professional Build

Billet Specialties Heater & Air Conditioning Bulkheads give your project vehicle's heat and A/C lines a custom professional appearance by cleaning up your engine bay. Precision machined from 6061-T6 billet aluminum, these bulkhead ports allow you to route multiple hoses in a confined space. Designed for heat, A/C or a combination of both, these billet bulkheads are engineered specifically for 5/8 in. inner diameter hose. Available in polished or black anodized finishes, hose end fittings sold separately.

Part TypeFirewall Bulkhead

Product LineBillet Specialties Heater & AC Bulkheads

BrandBILLET SPECIALTIES

Package Height0.2

Package Width4.8

Package Length8.7

Weight0.55 PG

Part CategoryAccessories

Bulkhead FinishBlack Anodized

Bulkhead Style4-port

QuantitySold individually

Bulkhead LocationFirewall