Menu

Shop

Garage

Cart

Account

Products to Compare (max of 3)
X
Compare These Parts

How to Reduce Under Hood Temp - Exhaust Wrap

8/28/2020
Add Article To List
Tags: Tech, Tech, Street, Street

To assist with keeping under hood temperatures down you may want to try wrapping your exhaust. Even though I am running stock cast iron exhaust manifolds on my 454 I was able to utilize Speedway Motors part number 91013804, 1-inch by 50-ft Black Header Wrap. Every little bit helps with keeping your car cool on those hot summer days when cruising. And with the smaller 1" design I was able to wrap the manifolds with sharp bends around the primary tubes fairly easily. Of course, it would be a lot easier to do this with the manifolds off of the car and I highly recommend removing them to wrap them. However, I gave it shot with them still on the vehicle.

Before I started I devised a plan of attack. I started with the first primary tube and wrapped it down to the main collector and past the second primary. For this, I wrapped one complete revolution around the primary tube, then removed the wrap and folded it over itself. Then I could gauge how much wrap I needed by overlapping the folded over portion working my way down the tube without actually wrapping it. That way I wasn't feeding 50-feet of wrap through a small area. Once I cut the length of wrap I needed to start I secured the top of the wrap by the head using Speedway Motors stainless steel exhaust wrap ties, part number 91560014 in 14 inch length. To secure this style of tie you feed the length through the head just like a normal zip tie.

However, the head on these don’t have a clip and the length of the tie is smooth. So you pull it tight onto itself and cut the excess off. I then used a pair of needle-nose pliers to roll the end over on itself up to the head of the tie to secure it tightly and not leave any sharp edges to catch on.

With the first primary tube wrapped I moved to the second and repeated the process until the entire exhaust manifold was covered. This was fairly easy to accomplish with the exhaust manifold still on the car and leaning over the fender. But as I stated earlier it would be a whole lot simpler to wrap the exhaust manifold off the vehicle and re-install.

I did extend the wrap all the way down the downpipe on my exhaust as well utilizing 50-feet of wrap per side. With both sides done I noticed a considerable difference in heat exposure versus the unwrapped manifold. This resulted in dropping my underhood temperatures and keeping my Big Block Chevy running cooler. It also gave my vehicle that old school performance look and covers up a pretty unsightly cast iron manifold.

Products Featured in this Article

Related Articles

Benefits of Electronic Ignition System Upgrades
by Mark Houlahan - Posted in Tech
6/8/2022
Upgrading to electronic ignition is a huge improvement in performance, reliability, and lower maintenance that you can add to just about any engine your project may be running. Learn all about your electronic ignition choices in this buyer's guide.
Using GoJak Wheel Dollies to Easily Move Your Vehicle
by Mark Houlahan - Posted in Videos
6/6/2022
The GoJak wheel dolly makes moving immobile vehicles around your shop easy as place, pump, and push! Watch the video for all the details and you'll wonder why your shop hasn't had a set sooner!
Understanding Shock Types and What Is Best for Your Project
by Mark Houlahan - Posted in Tech
6/3/2022
Shocks and struts may be confusing, but our buyer's guide is here to help you make sense of all the options.
Dual Plane vs Single Plane Intake Manifolds Explained
by Speedway Tech Team - Posted in Tech
5/6/2022
Dual plane or single plane intake manifold? Which is the best for your project vehicle's engine? Learn the differences in our buyer's guide.
Electric Fuel Pumps vs Mechanical Fuel Pumps: What Is Best For Your Application
by Mark Houlahan - Posted in Tech
5/3/2022
Learn how to best choose between an electric or mechanical fuel pump for your project vehicle. We help you you understand the differences in order to properly design a performance fuel system with our buyer's guide.
Installing Exterior Trim on a 1969 Chevelle
by Tyson Jurgens - Posted in Tech
4/18/2022
When Tyson picked up his '69 SS396, all the trim was in the trunk. We follow along as he installs the shiny stuff to finish out his project.
Ford And Chevy Spindle Options For Solid Axle Hot Rods
by Speedway Tech Team - Posted in Tech
4/4/2022
Dive into some of the history and unique differences between Ford and Chevy spindles for solid front axles and what will perform best on your hot rod.
Brake Pad Identification and Friction Surface Options Explained
by Speedway Tech Team - Posted in Tech
3/18/2022
We offer a guide to follow when selecting a new set of brake pads for your race or street car. It's important to know the friction quality and pad size before selecting a new set of disc brake pads.
Installing ICT Billet LS Motor Mount Adapters
by Speedway Tech Team - Posted in Tech
10/6/2021
Jordan shows us how to use ICT Billet motor mount adapters to bolt a 6.0 LS into his 3rd-Gen Firebird.
Wrapping Exhaust Manifolds to Reduce Under Hood Temps
by Kevin Webel - Posted in Tech
3/8/2021
Learn how to wrap exhaust headers to help keep under hood temperatures down. This articles shows how cast iron exhaust manifolds are wrapped in 1-inch black header wrap with stainless steel exhaust wrap ties.
Error
X
Note
X
Ok