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Old 05-22-2024, 09:03 AM   #1
70cst
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402 BB Spintech Mufflers
M7 70CST 402 with SpinTech mufflers.

https://www.youtube.com/watch?v=K1LXf66LGaY
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A husband can be right...or...A husband can be happy.

67-72 Chevy and GMC Trucks...The Classic Truck for the Classic Folk.

1970 CST Two tone green, 402BB, 400 Automatic, Tach, Buckets, AC, AM-FM, Tilt, GM CB, GM 8 Tract, LWB, etc

JOHN 17:3...The better side of "LIFE"

Remember: Everyday is a good day...Some are just gooder!
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Old 05-22-2024, 09:03 PM   #2
70STOVEBOLT
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Re: 402 BB Spintech Mufflers
Sounds good
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Old 05-22-2024, 10:39 PM   #3
71CHEVYSHORTBED402
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Re: 402 BB Spintech Mufflers
Quote:
Originally Posted by 70cst View Post
M7 70CST 402 with SpinTech mufflers.

https://www.youtube.com/watch?v=K1LXf66LGaY
I like it. BRRRRRRR
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71 Custom Deluxe, SWB, 2WD, 402, A/C. I developed an assm. guide "kit" for restoring the truck from ground up. With assys, the guide accts for 1000s details, OEM identifications & part numbers, written in short order. 700+ images of assm., illust., charts, and points of interest. Much of the info. applies to all 67-72 GM trucks, and to a lessor degree all 67-72 GM vehicles. My build thread, and more on the guide https://67-72chevytrucks.com/vboard/...d.php?t=730025
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Old Yesterday, 06:56 AM   #4
Palf70Step
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Re: 402 BB Spintech Mufflers
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Old Yesterday, 07:23 AM   #5
Joyridin
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Re: 402 BB Spintech Mufflers
Sounds good! I have Spintech on my truck also. Much nicer sound that Flowmasters.
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Old Yesterday, 12:19 PM   #6
70STOVEBOLT
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Re: 402 BB Spintech Mufflers
What series mufflers are those?
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70 C/10 SWB 402/TH400/3.73 "The Needy Beast"
200,000 Mile Club
Disc Brake Club

Owner installed options:
Front Sway Bar
Power Steering
Power Brakes
Cigar Lighter
Courtesy Lights
Deluxe Side Markers
Wiper Delay
Power windows
Power Locks
Sniper EFI

2015 Silverado 1500 LS 4.3/6L80/3.23 lowered 2" front & rear
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Old Yesterday, 06:36 PM   #7
Ekliptix
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Re: 402 BB Spintech Mufflers
The youtube comments say they're SPORTSMAN STREET 3000XL.

I also had Spintech 3000 series on my 402 BB. They were too loud and droned, for me.
https://youtu.be/J5CxfMAJR5U

Much happier with my dynomax super turbo mufflers, now.
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1972 Cheyenne Super SWB PS, PB, Tach, A/C, Tilt.
Drivetrain: Built 402BB, TCI Streetfighter 700R4, 2,500 stall, Eaton posi, 3.73. Suspension/Chassis: ECE 4.5/6.5 drop, CPP nitrogen shocks, CPP front and rear sway bar, CPP cross members. Exhaust: 3" exhaust with x-pipe, Spintech 3000 mufflers, Hooker ceramic coated headers. Best 1/4 mile time: TBD.
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Old Yesterday, 08:23 PM   #8
70cst
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Re: 402 BB Spintech Mufflers
Quote:
Originally Posted by 70STOVEBOLT View Post
What series mufflers are those?
I will check
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A husband can be right...or...A husband can be happy.

67-72 Chevy and GMC Trucks...The Classic Truck for the Classic Folk.

1970 CST Two tone green, 402BB, 400 Automatic, Tach, Buckets, AC, AM-FM, Tilt, GM CB, GM 8 Tract, LWB, etc

JOHN 17:3...The better side of "LIFE"

Remember: Everyday is a good day...Some are just gooder!
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Old Yesterday, 08:28 PM   #9
70STOVEBOLT
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Re: 402 BB Spintech Mufflers
Quote:
Originally Posted by Ekliptix View Post
The youtube comments say they're SPORTSMAN STREET 3000XL.

I also had Spintech 3000 series on my 402 BB. They were too loud and droned, for me.
https://youtu.be/J5CxfMAJR5U

Much happier with my dynomax super turbo mufflers, now.
I’m running Thrush turbos, snd I like the way they sound, but the est of my system is stainless sink want stainless mufflers. I thought about the Dynomax super turbos. I like the way your truck sounds too.
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70 C/10 SWB 402/TH400/3.73 "The Needy Beast"
200,000 Mile Club
Disc Brake Club

Owner installed options:
Front Sway Bar
Power Steering
Power Brakes
Cigar Lighter
Courtesy Lights
Deluxe Side Markers
Wiper Delay
Power windows
Power Locks
Sniper EFI

2015 Silverado 1500 LS 4.3/6L80/3.23 lowered 2" front & rear
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Old Yesterday, 10:21 PM   #10
jumpsoffrock
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Re: 402 BB Spintech Mufflers
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Originally Posted by Ekliptix View Post

Much happier with my dynomax super turbo mufflers, now.
I also like a more quiet ride and put these on my bone stock 402BB and am very happy. Not a lot of mileage on them though.
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Old Yesterday, 11:01 PM   #11
70cst
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Re: 402 BB Spintech Mufflers
Quote:
Originally Posted by 70STOVEBOLT View Post
What series mufflers are those?
Spintech Sportsman 3000
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A husband can be right...or...A husband can be happy.

67-72 Chevy and GMC Trucks...The Classic Truck for the Classic Folk.

1970 CST Two tone green, 402BB, 400 Automatic, Tach, Buckets, AC, AM-FM, Tilt, GM CB, GM 8 Tract, LWB, etc

JOHN 17:3...The better side of "LIFE"

Remember: Everyday is a good day...Some are just gooder!
Last edited by 70cst; Yesterday at 11:06 PM.
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Old Yesterday, 11:02 PM   #12
70cst
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Re: 402 BB Spintech Mufflers
Folks - these are quiet in the cab but great sounding outside...
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A husband can be right...or...A husband can be happy.

67-72 Chevy and GMC Trucks...The Classic Truck for the Classic Folk.

1970 CST Two tone green, 402BB, 400 Automatic, Tach, Buckets, AC, AM-FM, Tilt, GM CB, GM 8 Tract, LWB, etc

JOHN 17:3...The better side of "LIFE"

Remember: Everyday is a good day...Some are just gooder!
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Old Yesterday, 11:03 PM   #13
70cst
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Re: 402 BB Spintech Mufflers
Quote:
Originally Posted by Ekliptix View Post
The youtube comments say they're SPORTSMAN STREET 3000XL.

I also had Spintech 3000 series on my 402 BB. They were too loud and droned, for me.
https://youtu.be/J5CxfMAJR5U

Much happier with my dynomax super turbo mufflers, now.
Yep
__________________
A husband can be right...or...A husband can be happy.

67-72 Chevy and GMC Trucks...The Classic Truck for the Classic Folk.

1970 CST Two tone green, 402BB, 400 Automatic, Tach, Buckets, AC, AM-FM, Tilt, GM CB, GM 8 Tract, LWB, etc

JOHN 17:3...The better side of "LIFE"

Remember: Everyday is a good day...Some are just gooder!
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