I ran this setup on my 71 LT-1 and it was LOUD. 
69' side exhaust performance
Racer
Joined: Sep 2002
Posts: 421
Likes: 17
From: Newport News VA
I have a set of 69 installed on my 70. The original owner had them and a luggage rack dealer installed. I plan on going stock when the wallet allows.
pluses;
They do do give the car an aggressive and menacing look. Also the sound is a lot sweeter than under car exhaust.
Minuses; As stated, the sound is sweet, but with the t-tops in and on anything but a just down the raod some, well, it can get annoying. Also the heat transference can be terrible in warm weather.
You also better get used to smelling like exhaust when you leave the car.
My 2 cents, if you are young then the aggravation is probably worth the cool factor.
But if you have some age on you(53) that does not take long to reverse that equation.
pluses;
They do do give the car an aggressive and menacing look. Also the sound is a lot sweeter than under car exhaust.
Minuses; As stated, the sound is sweet, but with the t-tops in and on anything but a just down the raod some, well, it can get annoying. Also the heat transference can be terrible in warm weather.
You also better get used to smelling like exhaust when you leave the car.
My 2 cents, if you are young then the aggravation is probably worth the cool factor.
But if you have some age on you(53) that does not take long to reverse that equation.
Drifting
Joined: May 2011
Posts: 1,536
Likes: 1
From: Boca Raton FL
I have a set of 69 installed on my 70. The original owner had them and a luggage rack dealer installed. I plan on going stock when the wallet allows.
pluses;
They do do give the car an aggressive and menacing look. Also the sound is a lot sweeter than under car exhaust.
Minuses; As stated, the sound is sweet, but with the t-tops in and on anything but a just down the raod some, well, it can get annoying. Also the heat transference can be terrible in warm weather.
You also better get used to smelling like exhaust when you leave the car.
My 2 cents, if you are young then the aggravation is probably worth the cool factor.
But if you have some age on you(53) that does not take long to reverse that equation.
pluses;
They do do give the car an aggressive and menacing look. Also the sound is a lot sweeter than under car exhaust.
Minuses; As stated, the sound is sweet, but with the t-tops in and on anything but a just down the raod some, well, it can get annoying. Also the heat transference can be terrible in warm weather.
You also better get used to smelling like exhaust when you leave the car.
My 2 cents, if you are young then the aggravation is probably worth the cool factor.
But if you have some age on you(53) that does not take long to reverse that equation.
Melting Slicks
Joined: Feb 2001
Posts: 3,330
Likes: 13
From: Europe , Luxembourg
Hi
Do you have pics of the received sweet thunder 2.5" baffle system pipes ?
Realy interested if this is a straight pipe muffler system or again a reverse flow system like the original 69 muffler system.
Rgds. Günther
Do you have pics of the received sweet thunder 2.5" baffle system pipes ?
Realy interested if this is a straight pipe muffler system or again a reverse flow system like the original 69 muffler system.
Rgds. Günther
Melting Slicks
Joined: May 2009
Posts: 3,079
Likes: 315
2024 C3 of the Year Finalist - Unmodified
Allen's will sell you the '67 chambered mufflers with '69 exhaust pipes and outlets shipped loose, for fitment and tack welding on the car. They will also make you a deal on a set of new repro '69 covers for $2k. Probably a quieter way to go if factory correct appearance is not important. Once again, the problem with side exhaust is the restriction due to the 90 degree non-mandrel bends in the exhaust pipes.
Thread Starter
Instructor
Joined: Jun 2003
Posts: 101
Likes: 16
From: Calverton N.Y.
Works for me though. Looks great, sounds great, and honestly don't think there was any performance loss.
Racer
Joined: Dec 2009
Posts: 415
Likes: 10
From: Richmond Va
I know that this thread is discussing performance, but I did do a little modification to my Allen's side exhaust to help w/ exhaust smell. I put the in line catalytic converters that are 4" in diameter and it really cut down on the exhaust fumes. Very little change in sound, but you can stand right at the outlet now and you do not reek like gas/exhaust. Friends and family like taking a ride even more now.
Melting Slicks
Joined: Aug 2004
Posts: 2,220
Likes: 6
From: www.Z16.org North/West Pennsylvania
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Race Director
Joined: Jul 2004
Posts: 12,713
Likes: 329
From: Scottsdale Arizona
I know that this thread is discussing performance, but I did do a little modification to my Allen's side exhaust to help w/ exhaust smell. I put the in line catalytic converters that are 4" in diameter and it really cut down on the exhaust fumes. Very little change in sound, but you can stand right at the outlet now and you do not reek like gas/exhaust. Friends and family like taking a ride even more now.
I have the stock style pipes and agree that they are a little loud for my residential neighborhood. Once I get on the highway it's fine though. Not sure where that puts me on Makonut's age scale
