Hooker BlackHeart Shorty Headers

Fits 2008-2013 Silverado/Sierra 5.3L 1-3/4, V8 Stainless Steel Shorty Headers, C.A.R.B. EO# D-115-27

Part # 70301410-RHKR

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Emissions

This part is legal for sale and use on Emissions Controlled Vehicles, in all 50 states, when used in accordance with the manufacturers application guide because it has a California Air Resources Board (CARB) Executive Order (EO) number.

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Hooker continues to push the boundaries of performance with the BlackHeart line of exhaust products. We are proud to offer these stainless steel shorty headers for 2008-2013 Chevy Silverado/GMC Sierra vehicles. These headers feature 1-3/4-inch primary tubes with 2.50-inch collectors and are engineered to offer both premium fitment and maximum performance from your 5.3L engine. CARB compliant under EO # D-115-27.

Features:

Emissions compliant under C.A.R.B. EO# D-115-27
Max dyno gains of +18 HP & +22 LB.FT. torque
1-3/4” lightweight, 16-gauge, stainless steel construction maximizing strength and durability
3/8” thick, CNC header flanges are used for strength and maximum sealing surface
Utilizes true mitered merge collectors to maximize exhaust velocity and scavenging, resulting in a broad torque curve
Retains factory O2 sensors and catalytic converters
100% hand welded construction
Quality welds for strength, longevity and good looks
Tube geometry designed for maximum clearance and hassle-free installation
Manufacturer’s limited lifetime warranty

About Hooker BlackHeart

Shop the official site of Hooker BlackHeart and explore exhaust systems, engine swap kits, and mufflers for both import and domestic vehicles at Holley.com!

Bolt Size	M8 x 1.25 x 25mm
Brand	Hooker BlackHeart
C.A.R.B. EO #	D-115-27
CARB (California) Compliant	Yes
CARB EO#	D-115-20
	D-115-27
Collector Diameter	2.50 inch
Emission Code	1
Engine	GM Gen III/IV (LS)
Exhaust Series	Hooker BlackHeart
Header Finish	Natural
Header Style	Shorty
Material	304SS
Primary Tube Dia.	1-3/4 inch
Product Type	Headers
Tube Material	304 Stainless Steel
UPC	090127036716
Part Number	70301410-RHKR

The following vehicles are considered Emissions Controlled Vehicles:

1966 and newer U.S. manufactured California Certified vehicles
1968 and newer U.S. manufactured Federally Certified vehicles
1968 and newer Foreign manufactured vehicle

C.A.R.B. EO #D-115-27

Instructions for Part# 70301410-RHKR

Limited Lifetime Warranty Information for Part# 70301410-RHKR

C.A.R.B. EO# D-115-27

Recommend Accel Extreme 9000 high heat spark plugs #9004C to complete installation.

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Advertised performance vs. real life requirements

By Michael B on November 25, 2021

To the point: These headers can most likely provide their +18hp, but the spark plug wires are the issue. You cannot physically install "factory" designed wires on a number of cylinders. It's not the brand of the wires, it's the sheer lack of space. To be specific - cylinder numbers 3, 4, 5, and 6. Installation instructions do not specify, but you must, first, install spark plugs, second, connect plug wires to spark plugs, third, install headers, fourth, connect plug wires to coil packs. The magical cylinders (3,4,5,6) MUST have a certain angle on the spark plug boot. For visual reference, you can look at (Holley part #561-102). If you forget this requirement while installing, or if you're replacing a plug - you MUST remove the header. Cylinders 1, 2, 7, and 8 are normal and won't put up a fight. Also, I highly recommend wrapping both the header and the spark plug wires. I've burned through three! plug wires on the number 3 cylinder. It's the first time I've ever witnessed a plug wire almost melt in half (not once, not twice, but three times). I have pictures but don't see a way to post them. My personal opinion: There's this thing called "DFS" (Design for Serviceability). We all feel this pain when working on our vehicles, but I don't enjoy it with aftermarket components. I read on one forum that it was recommended to "ding" the headers so the plug wires would fit - I'm not doing that. Hooker - I'd happily give back a few horsepower to be able to change my spark plugs or spark plug wires without removing the Blackheart header. I know your engineers have far more knowledge than I'll ever have on exhaust systems ... ... but it would be really nice to have access to my plugs/plug wires.

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Some parts are not legal for use in California or other states with similar regulations.

Hooker BlackHeart Shorty Headers

Hooker BlackHeart Shorty Headers

Emissions

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