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Your cart is empty.This listing is for two (2) exhaust manifolds and two (2) 4" 7° risers (elbows) for Mercruiser MODEL 330-370, V8 (B.B.), GM 454/502 CID (1981 up to 0M SN#’s) with raw/fresh water cooling systems without spacers. P/N (2) 51240 (GL51240)+(2) 51140 (GL51140); equivalent to the contents in GLM part number 58242 (GL58242.) **NOT FOR DRY JOINT EXHAUST** THE 4" RISERS FIT 1981-early 2000's. Note:Ordering this item will require a signature confirmation upon delivery. Please ship to an address where a signature can be obtained from UPS.
chris m.
Reviewed in the United States on August 7, 2024
These are for one side of the motor just look at the pictures,you have to put different fittings and hoses on to make it work
W_E_Coyote
Reviewed in the United States on August 27, 2024
These are great quality but they should come with bolts. They require a different length bolt than the factory manifolds, which is a difficult surprise when you are trying to mount them because they weigh a ton.
Dan VanDerWoude
Reviewed in the United States on September 19, 2023
Absolute garbage installed these on my boat in March 2021 totally rotted out and destroyed my engine by June 2023. Do yourself a favor and buy OEM mercrusier parts not this junk. One star because I couldn’t do 0 stars
David arboleda
Reviewed in the United States on December 23, 2022
One riser seal melted. It came defective. It had to be replaced by quicksilver. I had to hire mechanic again
Verified buyer
Reviewed in the United States on May 15, 2017
Worked well and very complete kit, thanks!
Gambrelle
Reviewed in the United States on January 10, 2017
Item was exactly as described. Fit perfectly in our 80s model Chris-Craft. Fast shipping
Customer
Reviewed in the United States on September 9, 2016
Fit perfect !!!
Edward Kluska
Reviewed in the United States on October 29, 2016
Fit as expected very pleased
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