Here is a recent customer that just finished his 68 Camaro with a 416 small block running 13:1 compression on E-85 and obviously a little cam is involved here as well... thanks for the video Richard
The 69 Z/28 backing out for the first time.....nice!
Thanks Chuck Brick for the opportunity to put a Sweet Thunder Wild Gen 1 system on your beautiful 69 COPO Z/28 with the 413 @ 11.5:1 compression, 5 speed with 4:56 gears.... better make nice with the neighbors before you bring her home...
19 Reviews
Tell people what you think
Ross Spurling
· November 2, 2017
Met John and his team 2016 at Corvettes of Carlisle. John very helpful,and seemingly a nice fellow.
I'm a Corvette enthusiast, and was visiting from Australia. We are building 5 x C6 Z06 project cars ...down here, and were looking for an exhaust supplier.

We decided to trial a system on one of our cars, and if all was well, we would buy the remaining 4 systems.
Took a long while for the order to be processed and delivered to our freight forwarder in LA, but that was OK.
We were quoted $650 for the system, plus of course shipping. I had the system shipped without chrome tips, because they had a supply problem, and I needed the system asap. I was then given an account of $850 ( without chrome tips ).
I figured I would address this later, but for expediency sake, I just wanted the system, so I paid it.
Fast forward a few months and we finally received this system:- really disapointed.
System was not suitable for a Z06. It was only a 2.5" exhaust, and the pipes were not mandrel bent. Factory system was 3" and mandrel bent. I was not at all happy.
At this point my financial exposure was Aus$1750, and I have a system that is no earthly good to me.
I finally got hold of John through facebook, and he promised to put it right. Over the last 9 months I've heard it all:- waiting to get a donor Z06 as a pattern, etc, etc etc. Last excuse was waiting for chrome tips again.
Starting to feel like I'm being taking for a ride here.

Then John tells me company been taken from him, says he want to help me, but his hands are tied.
Whilst he appears to be a stand up guy, I suspect he is a very poor operator, and suckers like me have got caught up in his mess.

As a consequence I have a very poor opinion of John Crawford and Sweet Thunder Exhaust
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Trevor Knapp
· May 2, 2017
Was fortunate enough to be apart of the prototype for the V6 mustang. After john and his team installed the x pipe and custom exhaust, it completely transformed my V6 into a sound like no other! It no...w rumbles and cracks like every muscle car should. Also his team was tasked with cutting the fender to fit the dual exaust, absolute perfection with the cuts. All in all I HIGHLY recommend Sweet Thunder Exaust systems and their amazing team. See More
Jim Sibert
· October 5, 2016
Had the opportunity to let these guys prototype and develop an exhaust for my 2016 C7 Corvette. Without a doubt the best sounding exhaust on the market. It has that low rumble sound I thought I coul...d never find. Thanks to Ryan for all the creativity and Jason for the install assist. Thanks to John for the opportunity. See More
Joe Irby
· January 23, 2017
Well we bought the exhaust but when it arrived the box was demolished. The small parts were missing but the pipes were ok. I called to see if they (sweet thunder) would make it right. I called no just a voice mail that was in November it's now the end of January 2017 and several calls leaving messages NO Response at all I also need a little advice on noise. Oh bye the way it's for a 1965 mustang wth a 600 hp racing engine! I don't recommend this company because of lacK of customer support and services See More
Michael Rose
· June 17, 2016
I've been dealing with Sweet Thunder for 10years and all I can say is COMPLETE SATISFACTION!! John and Dave are great guys and the quality of the product and customer service has always been nothing l...ess than stellar!! I have Sweet Thunder mufflers on my wifes 79 Rally Sport,on our 96 F350 460cu in Ford Roll, I have Side Cannons in the side pipes of my 77 468 bbc camaro, and soon to have Side Cannons in my 70 Camaro side pipes as well as in the side pipes of our 77 Motion Super Vega Clone. I WILL NOT USE any other muffler on our personal Hi Perf cars or on Customers Classic or Muscle Cars. See More
Squid McLaughlin
· January 13, 2015
I've had sweet thunders on my 94 f150 for over a year and a half now and I can say without a doubt there is no better sounding truck within 50 miles of where I live! Even my die hard chevy friends wil...l say that the love the sound of my ol' ford. See More
Clifford Barnes
· August 11, 2016
The most awesome exhaust to come down the road lately. Wouldn't of believed it if I hadn't seen and heard it for myself.
Todd Riddle
· April 14, 2017
This is the real thing. Best exhaust out there. John and his team is awesome. Thanks again for a great product.
Laura Foote
· October 13, 2016
Quality work! Excellent service! You will not be disappointed.
Jim Daubney
· October 23, 2016
Website doesn't work. Code 500 errors. Fix the site and I'll gladly change my review.

Finishing up Johns 69 custom Corvette built on one of Chassis Concepts chassis. C6 front Suspension C4 rear end. Look for this car at the 2017 SEMA show

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1972 Corvette resto-mod 525 hp LS3, C6 Suspension, custom body 18's in the front 19's in the rear, custom body by Jeff, Sweet Thunder pipes... Will end up Cobalt Blue w/ Red leathers interior.... All being built by Jeff at Speed Vette.... This is going to be one fine C 3....






continental U.S.

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Say goodbye to the cold and snow for a few days...Join us In February in Zephyrhills Florida 16th-19th Stop in and see us!!! We will also be in Lakeland Florida the following weekend February 23rd-26th.... mention this add and receive 10% off... See you there…/winter-florida…/default.aspx

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Sweet Thunder Exhaust Systems updated their status.

Here is one for all the Chevy boys-n- girls a completely custom 69 Camaro LS7 from Run Rite Classics it will be featured at this years Detroit Auto Rama

Sweet Thunder will be closed from December 22 - January 2nd for the holiday season. Be safe and see you after the New Year!!

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Headed to the Charlotte North Carolina Raceway for the Charlotte Auto Fair September 21-25 stop in and see us and 1000's of cool rides... see you there

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ONLY ONE MORE WEEK!!! Until Corvette Carlisle...(Aug 24-28) Stop in and say hi at SPACES E, 14-17 Get your exhaust at discounted prices... and while your there check out THOUSANDS of Corvettes.....

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Stop in and see us at the 47th Annual NSRA / National Street Rod Association show in Louisville Kentucky August 4th-7th!!! 1 MILLION square feet of some of the finest STREET RODS you will ever see under one roof!!! Look us up and get your Sweet Thunder Mufflers at the show and SAVE BIG$$$$

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When it rains it pours... Sweet Thunder has been invited to be the exhaust supplier for this years upcoming Dream Car Build featured on the Speed Channel at the Daytona Turkey Run in Daytona Beach Florida... Building a 1955 Chevy Pickup from the ground up in 4 days...

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Sweet Thunder Exhaust Systems updated their status.

Sweet Thunder is proud to announce that we will now be the exclusive builder for Chassis Concepts for their complete line of C1,C2,and C3 IRS custom chassis. These systems will be available at all Chassis Concepts 26 dealers... Thanks Ray we look forward to exceeding your expectations...

Come See us at the Bloomington Gold Corvette Show June 23- 25 Spaces C105-C109 and see our New C6 Cat back System...

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Carlisle PA Gate 2 Isle A 35-38 Camaro,WS6, Chevelle, Corvette, Nova, Trucks and More..

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Sweet Thunder Exhaust Systems

Playin With the Trans Am

Stop in and see us at the FORD NATIONALS @ Carlisle, June 1-4...GATE 2 ISLE IA SPACES 34-38 RIGHT NEXT TO THE MIDWAY!!!! Mustangs, Broncos, Trucks, and More.....

Complete Cat back system from Sweet Thunder Exhaust With X pipe and tips