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NEW! 2.25" Borla ProXS Stainless Steel Muffler
You can choose a Z-Car from your garage, or from the selections above, to filter the store or check part fitment.
Part #:15-5063
Price: $128.99
Made In And Shipped From The USA
Includes:
- (1) 2 1/4" Borla ProXS Stainless Steel Exhaust Muffler
Description:
This Borla ProXS universal fit muffler is a great option for those planning to build a custom exhaust for their 300ZX-Z31 non-turbo. It pairs especially well with our performance headers. The dimensions are nearly identical to the included muffler for our performance cat-back exhaust kits, making it a particularly good option in cases where the kit muffler needs to be replaced.
Features:
- Made from T-304 Austenitic Stainless Steel for longevity
- Fully welded construction for strength & durability
- Designed for clamp or weld on installation
- Free flow design improves performance
- High-Temperature Continuous-Filament Fiber Acoustic Material for superior sound control
- Natural finish - can be brushed or polished prior to installation
Specifications:
- Overall Length: 19" (inlet tip to outlet tip)
- Body Length: 14"
- Body Width: 4"
- Body Height: 9.50"
- Inlet: 2.25", Centered*
- Outlet: 2.25", Offset*
*Note:
This muffler is designed for universal fitment. It is able to flow in either direction, allowing for the offset end to function as the inlet or the centered end as the outlet. Our MSA premium or performance exhaust kits are configured so that the centered end should be used as the inlet and the offset should be the outlet.
Application Note:
This muffler is meant for custom exhaust builds or as an alternative for Motorsport Auto 2 1/4" performance exhaust systems. It is not meant for stock pipes, which are significantly smaller diameter. Other aftermarket systems may not be close enough in dimensions or tube position to fit well. For 300ZX-Z31 models, 86-89 non-turbo models can use this muffler, but will require custom fitment. Not recommended for any 84-89 turbocharged models. If you are looking for a muffler to go with a custom exhaust build for your 84-89 turbo, see 15-5061 in Related Items. Not looking to build a custom exhaust for your 300ZX? You can see our complete performance kits here.
Installation Note:
When used with our performance cat-back exhaust kit (15-6026), this muffler installs horizontal with the outlet toward the driver's (left) side.
70-83 Note:
This muffler is a fantastic option for those looking to build a custom exhaust for their stock or lightly modified L6 engine. Need a replacement for the muffler included in your MSA Exhaust Kit? See 15-5061 in Related Items. Not looking to build a custom exhaust? We have several options for complete performance kits in the categories on this page.
Some parts may not fit every version of every year listed. See product Title & Description for any application breakdowns or customization options, and contact us with any questions.
- 1984 Nissan 300ZX-Z31
- 1985 Nissan 300ZX-Z31


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