Choose a Store
- Shop All
- Replacement Parts
- Performance Parts
- Accessories
- Oil & Fluids
- Special Offers
- Advance Rewards
- Advice & How-Tos
- Project Guides
Share
Flowmaster Inc. 40 Series Muffler - 2.50 Dual In / 3.00 Center Out - Aggressive Sound
3 year warranty
How Would You Like To Get This Item?
Store Pickup
Same Day Home Delivery
Home Delivery
Product Information
Product Details
Part No. 425403
Warranty Details (3 Year Warranty)
The Original 40 series muffler delivers an aggressive exterior and interior tone. If you're looking for that original Flowmaster sound this is the muffler is for you. Constructed of 16 gauge aluminized steel and fully MIG welded for maximum durability.
Product Features:
Product Features:
- Excellent Street/Strip and Off Road application
- Noticeable interior resonance
- Aggressive Sound Exterior Exhaust Tone
- Durable fully welded 16 gauge aluminized steel
Specifications
Body Height:
4.00 in
Body Length:
13.00 in
Body Material:
Aluminized Steel
Body Width:
9.50
Brand:
Flowmaster
Category:
Exhaust
Clamps Included:
No
Color:
Black
Fitment:
Universal
Grade Type:
Performance
Hanger Included:
No
Heat Shield Attached:
No
Inlet Connection:
Slip-Fit
Inlet Inside Diameter:
2.50 in
Inlet Outside Diameter:
2.63 in
Inlet Quantity:
2
Inlet Type:
Weld-On
Muffler Type:
Chambered
Outlet Connection:
Slip-Fit
Outlet Inside Diameter:
3.00 in
Outlet Location:
Center
Outlet Outside Diameter:
3.13 in
Outlet Quantity:
1
Outlet Type:
Single
Overall Length:
19.00 in
Product Type:
Street Mufflers
Reversible:
No
Shape:
Oval
Sub Category:
Mufflers
Tunable:
No
Universal Or Specific Fit:
Universal
Vehicle Type:
Street/Strip
4.41 out of 5
34 Customer Reviews
89% of respondents would recommend this to a friend
Ratings Distribution
5 Stars
25
4 Stars
4
3 Stars
1
2 Stars
2
1 Star
2
Pros
12
Great Sound
7
Easy To Install
5
Adds Style
5
Increases Power
3
Lightweight
Cons
3
No Increase In Performance
1
Good
Best Uses
9
Everyday Driving
6
Performance Driving
6
Replacement
6
Restoration
1
Racing
Car & Truck
1
Casual Driver
1
Truck Enthusiast
Describe Yourself
8
Auto Enthusiast
6
Truck Enthusiast
4
Casual Driver
3
Mechanic
1
Competitive Driver
Most Liked Positive Review
i wasnt sure at first about the sound
im restoring two 67 mustangs and replacing exhaust with them
Most Liked Negative Review
way too quiet
this is a very quiet muffler, nothing like I had thought. I drive a 03 impala ls and it sounds horrible, in the lower 2-3k rpms it sounds ok but when you gun it you cant even hear it.. very disappointed
Reviewed by 34 Customers
Nice
Very pleased with the sound and price
Bottom Line Yes, I would recommend to a friend
old school muscle car sound aggressive !
great muscle cars sound !
Bottom Line Yes, I would recommend to a friend
Too quiet
Staff Reviewer -
If u prefer a quiet cab and no heads being turned as you pass by. This muffler is for you .. Im try a thrush turbo next ..
1982 Chevy c10 Chevy 350 mild build ..
Bottom Line No, I would not recommend to a friend
i wasnt sure at first about the sound
Staff Reviewer -
im restoring two 67 mustangs and replacing exhaust with them
Bottom Line Yes, I would recommend to a friend
looking for performance at a good price
Verified Buyer -
Replaced original muffler with the 40 series on 2 of my classic cars, both of them sound great and perform better
Bottom Line Yes, I would recommend to a friend
Displaying Reviews 1 - 5Back to Top
No results
Feedback
Be The First To Know About Deals And Promotions.
Plus, create an account to receive $5 off of $20 or more.
TOP REPLACEMENT PARTS
ROUTINE MAINTENANCE PARTS
CUSTOMER SUPPORT
ABOUT US
PROFESSIONAL SHOPS