XForce | LS1 V8 Headers & Metallic Cat Kit | Holden VT-VZ 1 3/4" Primaries | H2-HV13B-KIT

XForce LS1 V8 Header & Metallic Cat Kit - 1 3/4" Primaries - H2-HV13B-KIT

Unlock the maximum potential of your LS1 V8 with the Xforce Header and Cat Kit. Crafted from high-strength 201-grade stainless steel, this kit features larger 1 3/4" primary pipes designed specifically for modified or high-output Gen III engines that require superior exhaust scavenging. The 4-into-1 tuned design merges into a 3" outlet for optimal flow velocity.

Included in this performance package are 3" metallic high-flow 100-cell catalytic converters. These "race-style" cats significantly reduce backpressure compared to standard ceramic units, allowing your V8 to breathe freely. Expect a noticeable increase in torque, horsepower, and a deeper, more aggressive exhaust note. This kit is a direct bolt-on solution when paired with an Xforce cat-back exhaust system.

What's in the Box?

1x Pair of 4-into-1 Headers (1 3/4" Primaries, 3" Outlets)
2x 3" Metallic High-Flow 100-Cell Catalytic Converters
Installation Gaskets and Bolt Hardware

Features:

Large 1 3/4" Primaries: Ideal for cammed or modified LS1 engines requiring increased flow.
3" Metallic Cats: 100-cell substrate provides maximum flow while maintaining a physical catalytic brick.
4-into-1 Tuned Design: Precision engineered to balance exhaust pulses and improve mid-to-high range power.
Durable Construction: Non-polished 201-grade stainless steel for long-lasting performance.
Broad Fitment: Suits a wide range of VT-VZ Holden and HSV RWD/AWD variants.

Important Installation Notes:

O2 Extension Looms: Required for installation as the sensor bungs are relocated (sold separately).
Dyno Usage: It is highly recommended to use tuning pipes in place of cats when tuning on a Dyno to avoid overheating the metallic substrate.

Specifications:

Make: Holden / HSV
Engine: 5.7L LS1 V8
Header Primary Size: 1 3/4" (45mm)
Header Outlet Size: 3" (76mm)
Material: 201 Stainless Steel
Cat Type: 100-cell Metallic

Important Information

The image shown may not reflect the actual product
Shipping times may vary depending on destination and stock availability

Vehicle Applications:

HSV Maloo (01/1994 - on), GTO (01/1994 - on), GTS (01/1994 - on), Sv300 (01/1994 - on), Senator (01/1994 - on), Clubsport (01/1994 - on), Avalanche (01/1994 - on), Coupe 4 (01/1994 - on), Grange (01/1994 - on), Holden Commodore (01/1994 - on), Calais (01/1994 - on), Crewman (01/1994 - on), One Tonner (01/1994 - on), Statesman (01/1994 - on), Monaro (01/1994 - on), Caprice (01/1994 - on), Adventra (01/1994 - on)

Make	Model	From	To	Body	Series	Engine	Variant	Drivetrain
HOLDEN / HSV
HOLDEN	ADVENTRA	08/2003	12/2007	Wagon	VY, VZ	LS1 5.7L	All V8	AWD
HOLDEN	COMMODORE	06/1999	12/2007	Sedan/Ute/Wagon	VT-VZ	LS1 5.7L	All V8	RWD
HOLDEN	MONARO	12/2001	07/2006	Coupe	V2, VZ	LS1 5.7L	All V8	RWD
HOLDEN	STATESMAN / CAPRICE	06/1999	07/2006	Sedan	WH, WK, WL	LS1 5.7L	All V8	RWD
HSV	CLUBSPORT / SENATOR	07/1999	09/2004	Sedan	VT, VX, VY	LS1 5.7L	i V8	RWD
HSV	MALOO	03/2001	09/2004	Ute	VU, VY	LS1 5.7L	i V8	RWD
HSV	GTS / GTO	04/1995	09/2004	Sedan/Coupe	VS, VT, VX, VY, V2	LS1/HSV V8	i V8	RWD

Warranty Information

Product Type	Warranty Period
304 & 201 Stainless Steel Exhaust Systems	60 Months
Accessories	12 Months
Catalytic Converters	12 Months
Electronic Products (Including SmartBox)	12 Months
Mild Steel & 409 Stainless Steel Exhaust Systems	24 Months
Mild Steel Headers	12 Months
Stainless Steel Headers	24 Months
Universal 304 Stainless Steel Mufflers	24 Months
Universal Mild Steel & 409 Stainless Steel Mufflers	12 Months

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