NOS Flag C11 Engine Oil Filter - Cross Ref FRAM PH4360 Wix 51049 GM V8

## Genuine Vintage Flag C11 Spin-On Engine Oil Filter (NOS)

Up for sale is a brand new, vintage **Flag C11** engine oil filter. This is high-quality New Old Stock (NOS) preserved in its wonderfully nostalgic, retro gradient box design. Perfect for period-correct classic vehicle projects, hot rod builds, or historical automotive displays.

*Please note: As shown in the photos, the original vintage cardboard box shows exterior cosmetic shelf wear, edge fraying, and minor age-related scuffs. However, the filter canister inside remains completely clean, unused, structurally sound, and ready for installation.*

### Technical Specifications:

* **Brand:** Flag

* **Part Number:** C11

* **Filter Style:** Full-Flow Spin-On Canister

* **Thread Measurement:** 3/4" - 16

* **Outer Diameter:** Approx. 3.66"

* **Height:** Approx. 5.18"

* **Compatibility:** Works safely with both conventional and synthetic motor oils.

### Industry Cross-Reference & Interchange:

This filter shares identical threads and core dimensions with the popular classic GM compact casing. It can safely replace or cross-reference with the following manufacturer part numbers:

* **FRAM:** PH4360 / PH7 / PH5

* **Wix:** 51049 / 51042

* **AC Delco:** PF31 / PF5 / PF24 / HC10

* **Baldwin:** B3 / V2A / V3A

* **Carquest:** 85049

* **Hastings:** LF107

### Exact Vehicle Fitment & Applications:

The C11 / 51049 profile features an extensive application history across older General Motors rear-wheel-drive platforms, primarily spanning the late 1960s through the mid-1980s. This includes:

* **Buick:** Classic configurations for LeSabre, Electra, Regal, Century, and Riviera models (specifically matching early V6, 350 V8, and 455 V8 blocks).

* **Oldsmobile:** Fitment for vintage Cutlass, Delta 88, Ninety-Eight, and Toronado configurations.

* **Pontiac:** Widely used on classic Bonneville, Grand Prix, Firebird, and Catalina models.

* **Cadillac:** Select classic full-size luxury applications utilizing standard GM filter footprints.

*Note: Please double-check your vehicle's physical clearance and factory thread dimensions, or use eBay’s compatibility check tool above to confirm exact engine application before purchasing.*

### Shipping & Returns:

* Securely packed inside a sturdy secondary box to guarantee the original vintage product packaging and mounting threads arrive fully protected.

* Fast, reliable shipping.

* Calculated shipping by weight—no automated overcharges.