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GM / Workhorse 8.1L

Manufacturer: Workhorse Performance Kits Model: STAGE1-0103-W22-PERFORMANCE
Stage 1 Description:Ultra RV Product’s Stage 1 Performance Kit get you the most “bang for your buck” when it comes to improving the power and shifting of your RV. No longer will your coach downshift at the slightest incline and rev the engine to the moon. The combination of our custom tuning and..
$1,134.99
Manufacturer: Workhorse Performance Kits Model: STAGE1-0410-W22-PERFORMANCE
Stage 1 Description:Ultra RV Product’s Stage 1 Performance Kit get you the most “bang for your buck” when it comes to improving the power and shifting of your RV. No longer will your coach downshift at the slightest incline and rev the engine to the moon. The combination of our custom tuning and..
$834.99
Manufacturer: Workhorse Performance Kits Model: STAGE2-0103-W22-PERFORMANCE
Stage 2 Description:Ultra RV Product’s Stage 2 Performance Kit has the benefits of Stage 1 but with the added air flow of our non-restrictive performance mufflers and Banks Ram Air Intake! You will love the throaty tone and improved acceleration that these air flow improvements provide when coupl..
$2,233.99
Manufacturer: Workhorse Performance Kits Model: STAGE2-0410-W22-PERFORMANCE
Stage 2 Description:Ultra RV Product’s Stage 2 Performance Kit has the benefits of Stage 1 but with the added air flow of our non-restrictive performance mufflers and Banks Ram Air Intake! You will love the throaty tone and improved acceleration that these air flow improvements provide when coupl..
$1,933.99
Manufacturer: Workhorse Performance Kits Model: STAGE3-0103-W22-PERFORMANCE
Stage 3 Description:Ultra RV Product’s Stage 3 Performance Kit takes the benefits of Stage 1 & 2 and tops it off with beautiful stainless steel LongTube headers. Constructed of heavy-wall, T304 series stainless steel, the headers have 5/8 inch-thick flanges that are welded on both sides for o..
$3,828.99
Manufacturer: Workhorse Performance Kits Model: STAGE3-0410-W22-PERFORMANCE
Stage 3 Description:Ultra RV Product’s Stage 3 Performance Kit takes the benefits of Stage 1 & 2 and tops it off with beautiful stainless steel LongTube headers. Constructed of heavy-wall, T304 series stainless steel, the headers have 5/8 inch-thick flanges that are welded on both si..
$3,579.67
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