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Hooker Maximum Flow Mufflers 21609HKR

Muffler, Maximum Flow, 4 in. Inlet/4 in. Outlet, 14 in. Case Length, Steel, Aluminized, Each

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Brand: Hooker Headers

Manufacturer's Part Number: 21609HKR

Part Type: Mufflers

Product Line: Hooker Maximum Flow Mufflers

Summit Racing Part Number: HOK-21609HKR

UPC: 090127574300

Muffler Material: Steel

Case Shape: Oval

Inlet Diameter (in): 4.000 in.

Inlet Quantity: One

Inlet Location: Center

Outlet Diameter (in): 4.000 in.

Outlet Quantity: One

Outlet Location: Center

Reversible: Yes

Internal Construction: Perforated stainless tube with packing

Muffler Finish: Aluminized

Case Exterior Length (in.): 14.000 in.

Overall Length (in): 18.000 in.

Thickness (in): 4.750 in.

Width (in): 10.250 in.

Outlet Style: Standard, without tip

Quantity: Sold individually.

In-Store Pickup: Choose In-store pick-up (OH, NV, GA, TX) on our web site.

Hooker Maximum Flow mufflers allow 99 percent more exhaust flow and produce more horsepower and torque than a 2 1/2 in. open pipe. They're constructed from aluminized and stainless steel and use high-temperature packing material to absorb excessive noise, while allowing a rich, low-toned sound. As with all absorption-type silencers, the Maximum Flow mufflers will be most effective for sound control on lower-compression (8.5 to 1 and lower) motors with conservative camshafts and on applications using catalytic converters. The Maximum Flow mufflers flow either direction, allowing for easy installation.

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Questions & Answers Ask a Product Question
Q:

Is the inlet and outlet pipe size 4" ID so it slips over a 4"OD exhaust pipe?

Asked by THOMAS on April 22, 2017

A:

Thank you for your question. Hooker Headers 21609HKR does have a 4 in. ID inlet and outlet and will slip over 4 in. OD pipe.

Summit RacingSummit Racing Answer - May 10, 2017

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Most Helpful Reviews Review This Product

10 Customer Reviews for Hooker Headers 21609HKR - Hooker Maximum Flow Mufflers

Average Customer Review

5 Star

(9)

4 Star

(0)

3 Star

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2 Star

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1 Star

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Enhanced the Sleeper Effect

Summit RacingSummit Racing Verified Purchase

HOK-21609HKR
2003 Silverado long box, regular cab, grandpa mobile. 4.8 turbo, 12 psi / 500 hp. Truck is a daily driver and the exhaust has been a little too loud for my liking. I have tried a few others, but with the addition of the 4" Hooker Max Flow the sound level is very much under control. A little rumble at idle and at tip in, just slightly more than stock. When rolling into the boost the only sound is from the turbo on the intake side. Keeps my sleeper stealthy. Have not had it back on the dyno but there does not seem to be any change in the power level or spool up time. Have had it on the truck for 2 weeks roughly 500 miles and it seems to be a great product. ...read more

1 of 1 found this review helpful.

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Reviewer: from MI

Date: August 06, 2018

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Ease of Installation
Price/Value
Quality

Hooker Max Flow 4 Muffler

Summit RacingSummit Racing Verified Purchase

HOK-21609HKR
I went with the Hooker Max Flow Muffler due to straight flow and quieter than other mufflers its 14 inch case size. For its price and performance, best muffler for the buck. Highly recommend.

1 of 1 found this review helpful.

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Reviewer: from TX

Date: March 21, 2014

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Quality

I love them very loud at w.o.t

Summit RacingSummit Racing Verified Purchase

HOK-21609HKR
Very well built and very nice sound

0 of 0 found this review helpful.

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Reviewer: from CA

Date: March 01, 2019

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Good Quality Muffler

Summit RacingSummit Racing Verified Purchase

HOK-21609HKR
Pretty solid muffler. Can't comment on exhaust tone yet.

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Reviewer: from MN

Date: March 22, 2017

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PERFECT

Summit RacingSummit Racing Verified Purchase

HOK-21609HKR
Surprisingly quiet at idle and talks to you good up top. Just what I was looking for

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Reviewer: from LA

Date: January 18, 2017

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Quality

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

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